refactor(docs): remove documentation from monorepo

[Athemis]

Documentation is being extracted to dbrepo-project/dbrepo-docs. This PR removes docs and related traces from the monorepo.

Description

Please provide a brief description of the changes in this pull request.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes, no API changes)
• Dependency update

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[Copilot]

Pull request overview

This PR removes the MkDocs-based documentation site from the monorepo in preparation for hosting docs in dbrepo-project/dbrepo-docs.

Changes:

• Deleted mkdocs.yml and the entire docs/ documentation tree (pages, assets, overrides, OpenAPI helper files).
• Removed the DOC_VERSION variable from the root Makefile.
• Removed the gen-docs-doc Make target (but other docs-related generation targets/refs remain).

Important note: As implemented, the monorepo still contains docs-related build hooks (e.g., make/gen.mk: gen-openapi-doc) and external automation (e.g., .gitlab-ci.yml) still expects gen-docs-doc, ./site/*, and ./docs/.openapi/*. This will break the docs/release pipeline unless those are updated as part of this PR or in a coordinated follow-up.

Reviewed changes

Copilot reviewed 94 out of 281 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
mkdocs.yml	Removed MkDocs site configuration.
Makefile	Removed DOC_VERSION variable.
make/gen.mk	Removed gen-docs-doc target (docs generation step).
docs/why.md	Removed documentation page (moved out of repo).
docs/user-guide/update-visibility.md	Removed documentation page (moved out of repo).
docs/user-guide/quickstart.md	Removed documentation page (moved out of repo).
docs/user-guide/index.md	Removed documentation page (moved out of repo).
docs/user-guide/import-live-data.md	Removed documentation page (moved out of repo).
docs/user-guide/import-dataset.md	Removed documentation page (moved out of repo).
docs/user-guide/get-data.md	Removed documentation page (moved out of repo).
docs/user-guide/delete-database.md	Removed documentation page (moved out of repo).
docs/user-guide/database-dashboard.md	Removed documentation page (moved out of repo).
docs/user-guide/database-access.md	Removed documentation page (moved out of repo).
docs/user-guide/create-subset.md	Removed documentation page (moved out of repo).
docs/user-guide/create-pid.md	Removed documentation page (moved out of repo).
docs/user-guide/create-database.md	Removed documentation page (moved out of repo).
docs/user-guide/create-account.md	Removed documentation page (moved out of repo).
docs/stylesheets/extra.scss	Removed docs styling source.
docs/stylesheets/extra.css.map	Removed docs styling sourcemap.
docs/stylesheets/extra.css	Removed docs styling output.
docs/publications.md	Removed documentation page (moved out of repo).
docs/presentations/.gitkeep	Removed/unused docs placeholder content.
docs/papers/weise2022dbrepo.xml	Removed docs asset (publication export).
docs/papers/weise2022dbrepo.ris	Removed docs asset (publication export).
docs/papers/weise2022dbrepo.rdf	Removed docs asset (publication export).
docs/papers/weise2022dbrepo.bib	Removed docs asset (publication export).
docs/overrides/partials/copyright.html	Removed MkDocs Material override.
docs/overrides/main.html	Removed MkDocs Material override.
docs/overrides/.icons/wikimedia/open-access.svg	Removed docs icon asset.
docs/maintainer-guide/updating.md	Removed documentation page (moved out of repo).
docs/maintainer-guide/troubleshooting.md	Removed documentation page (moved out of repo).
docs/maintainer-guide/restore-data.md	Removed documentation page (moved out of repo).
docs/maintainer-guide/install-vm.md	Removed documentation page (moved out of repo).
docs/maintainer-guide/install-kubernetes.md	Removed documentation page (moved out of repo).
docs/maintainer-guide/install-docker.md	Removed documentation page (moved out of repo).
docs/maintainer-guide/index.md	Removed documentation page (moved out of repo).
docs/maintainer-guide/configuration.md	Removed documentation page (moved out of repo).
docs/maintainer-guide/build-source.md	Removed documentation page (moved out of repo).
docs/maintainer-guide/backup-data.md	Removed documentation page (moved out of repo).
docs/kubernetes.md	Removed documentation page (moved out of repo).
docs/installation.md	Removed documentation page (moved out of repo).
docs/index.md	Removed documentation landing page content.
docs/index.html.tpl	Removed docs redirect template.
docs/images/TU_Signet_weiss_transparent_300dpi_RGB.png	Removed docs image asset.
docs/images/signet_black.png	Removed docs image asset.
docs/images/security.svg	Removed docs badge/asset.
docs/images/pulls.svg	Removed docs badge/asset.
docs/images/pipeline.svg	Removed docs badge/asset.
docs/images/maintainability.svg	Removed docs badge/asset.
docs/images/logos/favicon.svg	Removed docs favicon asset.
docs/images/coverage.svg	Removed docs badge/asset.
docs/images/branching-strategy.svg	Removed docs diagram asset.
docs/help.md	Removed documentation page (moved out of repo).
docs/get-started.md	Removed documentation page (moved out of repo).
docs/examples/xps-data.md	Removed documentation page (moved out of repo).
docs/examples/transportation.md	Removed documentation page (moved out of repo).
docs/examples/theater.md	Removed documentation page (moved out of repo).
docs/examples/survey.md	Removed documentation page (moved out of repo).
docs/examples/power.md	Removed documentation page (moved out of repo).
docs/examples/pls-data.md	Removed documentation page (moved out of repo).
docs/examples/music.md	Removed documentation page (moved out of repo).
docs/examples/lute-data.md	Removed documentation page (moved out of repo).
docs/examples/index.md	Removed documentation page (moved out of repo).
docs/examples/health.md	Removed documentation page (moved out of repo).
docs/examples/hazard.md	Removed documentation page (moved out of repo).
docs/examples/covid-19.md	Removed documentation page (moved out of repo).
docs/examples/air.md	Removed documentation page (moved out of repo).
docs/dev/services/ui.md	Removed documentation page (moved out of repo).
docs/dev/services/storage-service.md	Removed documentation page (moved out of repo).
docs/dev/services/search-service.md	Removed documentation page (moved out of repo).
docs/dev/services/search-db.md	Removed documentation page (moved out of repo).
docs/dev/services/metric-db.md	Removed documentation page (moved out of repo).
docs/dev/services/metadata-service.md	Removed documentation page (moved out of repo).
docs/dev/services/metadata-db.md	Removed documentation page (moved out of repo).
docs/dev/services/identity-service.md	Removed documentation page (moved out of repo).
docs/dev/services/gateway-service.md	Removed documentation page (moved out of repo).
docs/dev/services/data-service.md	Removed documentation page (moved out of repo).
docs/dev/services/data-db.md	Removed documentation page (moved out of repo).
docs/dev/services/dashboard-service.md	Removed documentation page (moved out of repo).
docs/dev/services/cache-db.md	Removed documentation page (moved out of repo).
docs/dev/services/broker-service.md	Removed documentation page (moved out of repo).
docs/dev/services/auth-service.md	Removed documentation page (moved out of repo).
docs/dev/index.md	Removed documentation page (moved out of repo).
docs/dev/contributing.md	Removed documentation page (moved out of repo).
docs/dev/changelog.md	Removed documentation page (moved out of repo).
docs/deployment.md	Removed documentation page (moved out of repo).
docs/customization.md	Removed documentation page (moved out of repo).
docs/contact.md	Removed documentation page (moved out of repo).
docs/api/rest.tpl	Removed docs template for REST API page generation.
docs/api/python.tpl	Removed docs template for Python API page.
docs/api/python.md	Removed documentation page (moved out of repo).
docs/api/oai-pmh.md	Removed documentation page (moved out of repo).
docs/api/json-ld.md	Removed documentation page (moved out of repo).
docs/api/index.md	Removed documentation page (moved out of repo).
docs/api/fair-signposting.md	Removed documentation page (moved out of repo).
docs/api/broker.md	Removed documentation page (moved out of repo).
docs/.prometheus/metrics-generate.sh	Removed docs-related metrics generation script.
docs/.openapi/swagger-ui.html	Removed docs OpenAPI Swagger UI wrapper.
docs/.openapi/openapi-merge.json	Removed OpenAPI merge configuration.
docs/.openapi/openapi-generate.sh	Removed OpenAPI generation script.
docs/.openapi/custom.css	Removed Swagger UI custom styling.
docs/.openapi/api.base.yaml	Removed OpenAPI base definition.
docs/.openapi/.gitignore	Removed docs OpenAPI gitignore.
docs/.gitignore	Removed docs-specific gitignore.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Athemis]

This is related to #55