chore: bump version to v2.2.0 and update documentation

Version updates:
- marketplace.json metadata.version: 2.0.0 → 2.2.0
- marketplace.json projman version: 2.0.0 → 2.2.0
- plugins/projman/plugin.json version: 2.0.0 → 2.2.0

Documentation updates:
- CHANGELOG.md: Changed [Unreleased] to [2.2.0] - 2026-01-20
- README.md: Updated projman version to v2.2.0
- README.md: Added /review and /test-check to commands list
- README.md: Added code-reviewer to agent list
- README.md: Updated Key Features section to v2.2.0
- README.md: Added validate-marketplace.sh to structure
- plugins/projman/README.md: Updated title to v2.2.0
- plugins/projman/README.md: Updated version changelog

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/projman/README.md

@@ -1,4 +1,4 @@
-# Projman v2.0.0 - Project Management for Claude Code
+# Projman v2.2.0 - Project Management for Claude Code
 
 Sprint planning and project management plugin with full Gitea integration.
 
@@ -481,9 +481,11 @@ MIT License - See repository root for details
 
 ## Version
 
-**Current:** 2.0.0
+**Current:** 2.2.0
 
 **Changelog:**
+- v2.2.0: Added `/review` and `/test-check` commands, code-reviewer agent, marketplace compliance updates
+- v2.1.0: Documentation improvements, canonical paths, initial-setup command
 - v2.0.0: Full Gitea integration with wiki, milestones, dependencies, parallel execution
 - v1.0.0: Initial release with basic commands