refactor: consolidate docs folders under docs/ (#1247)
move docs/, docs-internal/, and docs-site/ into a single docs/ umbrella
(docs/public, docs/internal, docs/site) so documentation lives in one place.
- update deploy-docs workflow paths + build/deploy commands
- recreate astro content symlink (docs/site/src/content/docs -> ../../../public)
- update root justfile, docs/site/justfile api-ref recipe
- fix loq.toml paths (3 entries were already stale from a prior move)
- update github links in public docs (artists/listeners/contributing)
- update skill files and STATUS.md references
- verified astro build still produces 43 pages
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