Consolidate the attention-filters skill (122 lines) into check-phase,
reducing check-phase from 234 to 110 lines. Removed verbose bash code
blocks, 30-line consolidated output example, re-check protocol (belongs
in act-phase), and motivational section. Updated all references in
README, plugin.json, using-archeflow, and colette-bridge.
- README: complete rewrite with all 24 skills, 8 scripts, architecture overview
- CHANGELOG: v0.1.0 → v0.2.0 → v0.3.0 with full feature history
- using-archeflow: updated skill reference to all 24 skills in 6 categories
- plugin.json: version bump to 0.3.0
- roadmap: updated with v0.3.0 features