refactor: remove mvp wording from unsupported subset messaging

[vitormattos]

No description provided.

[Copilot]

Pull request overview

The PR is titled and described as a small refactor to remove "MVP" wording from the UnsupportedSubsetException message, but the diff actually delivers a broad set of changes: a real refactor extracting TemplateDocumentBuilder from XObjectTemplateCompiler, a bug fix in PdfEscaper's backslash escaping, new unit tests (builder, layout, color, escaper, parser inheritance), SPDX headers across the repo, license-file expansion, REUSE config rewrite, removal of .env.example/package.json/commitlint.config.cjs/scripts/lint-shell.sh/README docker section, and a large CI rewrite (composite shell-quality action, shell-based DCO/commitlint, many GitHub Action major-version bumps, and PHP-version detection from composer.json).

Changes:

• Replace MVP-specific exception message with generic unsupported-tag message and extend parser/escaper test coverage.
• Extract PDF content/resource/metadata assembly into Pdf\TemplateDocumentBuilder, mark compiler/layout engine readonly, and fix PdfEscaper backslash escaping.
• Rewrite tooling/CI: add SPDX headers everywhere, replace npm-based commitlint + tim-actions/dco with shell scripts, bump many action majors, add composite shell-quality action, and drop the reuse/reuse Composer bin.

Reviewed changes

Copilot reviewed 89 out of 89 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/Html/SubsetHtmlParser.php	Removes "MVP subset" wording, splits parser into element/text helpers, hardens libxml error handling.
src/XObjectTemplateCompiler.php	Delegates PDF assembly to TemplateDocumentBuilder; keeps legacy escaper/parser arguments.
src/Pdf/TemplateDocumentBuilder.php	New builder producing content stream, resources, metadata, and bbox.
src/Pdf/PdfEscaper.php	Fixes incorrect double-escaped backslash search/replace.
src/Pdf/ColorParser.php, src/Layout/, src/Css/, src/Dto/, src/Contract/, src/Exception/, src/Integration/	SPDX headers and minor formatting; layout engine marked readonly and split into multi-line calls.
tests/Unit/TemplateDocumentBuilderTest.php, TemplateDocumentBuilderCompatibilityTest.php, SubsetHtmlParserAdvancedTest.php, LinearLayoutEngineTest.php, ColorParserTest.php, PdfEscaperTest.php, PdfEscaperColorParserTest.php	New unit tests for builder, parser inheritance, layout, escaping, and color parsing.
tests/Unit/XObjectTemplateCompilerTest.php, tests/Unit/SubsetHtmlParserTest.php, tests/Unit/SignatureAppearanceXObjectAdapterTest.php, tests/Integration/VisibleSignatureBusinessRuleTest.php	SPDX headers and string-wrapping cleanups.
composer.json, vendor-bin/qa/composer.json, vendor-bin/mutation/composer.json, infection.json5, rector.php, phpcs.xml, phpmd.xml, phpcpd.xml, psalm.xml	Allow infection/extension-installer, drop reuse/reuse, skip NewInInitializerRector, relax PHPMD rules, add SPDX headers.
REUSE.toml, LICENSE, LICENSES/AGPL-3.0-or-later.txt	Restructure REUSE annotations; add full AGPL license text.
docker-compose.yml, scripts/licenses-check.php, benchmarks/*.php	SPDX headers only.
package.json, commitlint.config.cjs, scripts/lint-shell.sh, .env.example	Removed (npm dev-deps, lint-shell script, env example).
README.md, CHANGELOG.md, CONTRIBUTING.md, CODE_OF_CONDUCT.md, SECURITY.md, .github/copilot-instructions.md, .github/PULL_REQUEST_TEMPLATE.md, .github/FUNDING.yml, .github/release-drafter.yml, .github/dependabot.yml, .github/ISSUE_TEMPLATE/*	SPDX headers; remove Docker section + MVP wording; add release-drafter template body.
.github/actions/shell-quality/action.yml	New composite action consolidating shell-quality checks.
.github/workflows/*.yml	Bump action major versions, detect PHP from composer.json, replace npm commitlint and tim-actions/dco with shell scripts, reuse composite shell-quality action, harden hadolint invocation, drop PHP matrix in compatibility-matrix.