README table of contents is missing #915

Backlog source: docs/issues/backlog-100-issues.md
Backlog item: I-001
Section: Section A — README and Landing Docs (Issues 1–12)
Tag: IA
Commit context: 9776e85

Observed gap

• README table of contents is missing; readers must scroll through 420 lines to locate sections.

Requested outcome

• Turn this backlog item into a concrete repo change in the referenced documentation, tutorial, architecture guide, or contributor workflow.
• Update related cross-links, examples, or adjacent documentation where needed so the change does not leave the docs tree inconsistent.

Completion criteria

• The gap described above is resolved in the repository.
• Any affected docs navigation or contributor guidance remains internally consistent.
• The issue can be closed with a concrete documentation or process change, not just discussion.