Adds build-time validation to catch broken, stale, or miscased internal documentation links in both JSDoc and markdown, including `/api/` and `/guide/` URLs and their fragments. Updates the documentation pipeline to share the canonical route manifest, ensuring that all references are checked against the current navigation structure.
(cherry picked from commit c1829f6d7c)
This commit extracts the heading ID generation logic into a shared utility
and updates both the route generation script and the markdown pipeline to use it.
This ensures consistency between the generated routes and the rendered
documentation, and fixes an issue where custom heading IDs (`{#id}`)
were ignored during route generation.
Fixes#67200
The list of valid links is generated from navigation data configuration in the ADEV app.
Redirections are knowingly exclude so we stop referencing them.
SkyZeroZx