Consolidate documentation into docs/ directory
- Move 5 top-level docs (APPS, CALLOSUM, CORTEX, DOCTOR, JOURNAL) to docs/
- Move 5 subdirectory READMEs to docs/ with descriptive names (CONVEY, THINK,
INTEGRATION_TESTS, VENDOR, SCREEN_CATEGORIES)
- Create new OBSERVE.md and MUSE.md documentation
- Add symlinks from package directories to their docs (apps/, convey/, think/,
observe/, muse/, tests/integration/, convey/static/vendor/, observe/categories/)
- Update all cross-references to use docs/ paths
- Convert bold doc references to proper markdown links for consistency
- Keep AGENTS.md and README.md at root, CLAUDE.md symlink unchanged
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>