docs: sync documentation with Sprint 4 & 5 commands
- Update CLAUDE.md version from 5.1.0 to 5.2.0
- Update marketplace.json plugin versions to match CHANGELOG
- projman 3.2.0 → 3.3.0
- git-flow 1.0.0 → 1.2.0
- pr-review 1.0.0 → 1.1.0
- clarity-assist 1.0.0 → 1.2.0
- doc-guardian 1.0.0 → 1.1.0
- claude-config-maintainer 1.0.0 → 1.1.0
- cmdb-assistant 1.1.0 → 1.2.0
- data-platform 1.0.0 → 1.2.0
- viz-platform 1.0.0 → 1.1.0
- contract-validator 1.0.0 → 1.2.0
- Add 18 missing commands to README.md and COMMANDS-CHEATSHEET.md
- /sprint-diagram, /pr-diff, /changelog-gen, /doc-coverage
- /stale-docs, /config-diff, /config-lint, /cmdb-topology
- /change-audit, /ip-conflicts, /lineage-viz, /dbt-test
- /data-quality, /chart-export, /accessibility-check
- /breakpoints, /dependency-graph
- Add contract-validator plugin to COMMANDS-CHEATSHEET.md
Closes #277
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>