[Exeloo]

What does this PR do?

No linked issue: part of the docs layout rework (NanoForge-dev/actions#117).

• .github/nanoforge.json: docs.category cli → loader. The new docs-sync deletes and rewrites the category's folder, so loader can't share docs/cli with the CLI any more. The docs site shows it as a "Loader" group of the CLI dropdown.
• docs/docs/loader/1-overview.mdx → docs/docs/overview.mdx (and client, website, server), docs/docs/navigation.json.
• Links fixed (./2-client → ./client), mintlify/components imports removed.

How do you test this PR?

• docs-sync caught the stale ./2-client links before the fix; after it, check passes. Synced into the docs branch: mint validate, broken-links and a11y pass.
• pnpm lint pass; the push hook ran lint, build and unit tests (pass).

Merge danger

Door: two-way. URLs move from /docs/cli/loader/... to /docs/loader/... (redirected by the docs PR).
Blast radius: docs pages and the docs category 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). Don't release loader with this config before NanoForge-dev/actions#117: the old sync would write docs/loader next to the old docs/cli/loader.

Follow-up issues

None.

Quality gate

Check	Result	Notes
Docs	Updated	this PR is docs
Correctness	Pass
Performance	N/A (text only)
Accessibility	Pass	mint a11y
Security	Pass
Style	Pass	lint pass