Fix agent loading and categorization issues

- Fixed YAML frontmatter errors in all agent files causing loading failures
- Added proper category fields to all 16 agents for correct classification
- Standardized agent names to match filenames for consistency
- Updated TODO.md to reflect completed agent system fixes
- Enhanced agents-install-cli make target with pip upgrade and user guidance

All agents now load properly without warnings and display in correct categories:
- Documentation (1), Code Quality (4), Project Management (4)
- Development Process (3), Infrastructure (1), Testing (3)

🤖 Generated with [Claude Code](https://claude.ai/code)

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

TODO.md

@@ -107,6 +107,15 @@ This version focuses on production readiness and enhanced automation capabilitie
   - Robust venv creation and activation
   - Dependency installation with upgrade handling
   - Status checking and validation
+* **CLI installation make target (agents-install-cli)** - DONE
+  - Target is working properly and requires virtual environment activation as documented
+  - Installation process functions correctly with proper venv setup
+* **YAML frontmatter errors in agent files** causing loading failures - DONE
+  - All 16 agents now properly loading without YAML parsing errors
+  - Frontmatter format standardized across all agent definitions
+* **Agent categorization issues** (agents showing as "Unknown" instead of proper categories) - DONE
+  - All 16 agents now properly categorized and displaying correct categories
+  - Category mapping and recognition system functioning correctly
 
 ### ✅ Completed: To Secure
 * **Configuration file validation** - DONE