[Exeloo]

What does this PR do?

No linked issue: part of the docs layout rework (NanoForge-dev/actions#117). With it, the editor docs reach the docs site for the first time.

• docs/docs/navigation.json: the sidebar order (Getting started, Using the editor, Plugins), from the list that was in docs/docs/README.md.
• docs/docs/README.md removed: every .md in docs/docs would be a published page, and its copy instructions are obsolete. Its screenshot notes move to CLAUDE.md, with the rule that every page is listed once in the navigation.

How do you test this PR?

• docs-sync check of this branch passes (26 pages, all listed, links resolve). Synced into the docs branch: mint validate, broken-links and a11y pass.
• pnpm lint, pnpm typecheck pass; the push hook ran lint, typecheck and unit tests (pass).

Merge danger

Door: two-way.
Blast radius: docs only.
Order: release NanoForge-dev/actions#117 as 3.2.0 first. Until then the old @v3 sync would copy these renamed pages next to the old ones and regenerate the docs repo docs.json. Then merge this PR, and NanoForge-dev/docs (opened next) last. After NanoForge-dev/actions#117, a release of this repo without this PR fails the docs step before writing anything (safe, continue-on-error).

Follow-up issues

• pnpm lint failed once at the knip step and did not reproduce #224

Quality gate

Check	Result	Notes
Docs	Updated	navigation, CLAUDE.md
Correctness	Pass
Performance	N/A (text only)
Accessibility	Pass	mint a11y: all images have alt text
Security	Pass	the EDITOR_TOKEN cookie note in create-your-first-project is accurate and already public in this repo
Style	Pass	lint pass; one knip failure that didn't reproduce (#224)