Update installation scripts and documentation

- Enhanced install.sh with better error handling and multi-shell support
- Updated configuration files (CLAUDE.md, MCP.md, RULES.md) to latest version
- Added comprehensive CONTRIBUTING.md guidelines
- Improved README.md formatting and clarity
- Fixed Commands_Cheat_Sheet.md formatting
- Updated .gitignore with better exclusions
- Minor LICENSE and CHANGELOG.md updates

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

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

Commands_Cheat_Sheet.md

@@ -4,7 +4,7 @@
 
 ### `/user:analyze` - Multi-dimensional code analysis
 - `--code` - Code quality review
-- `--arch` - Architecture analysis  
+- `--arch` - Architecture analysis
 - `--profile` - Performance profiling
 - `--security` - Security assessment
 - `--perf` - Performance bottlenecks
@@ -158,5 +158,3 @@
 - Documentation: `/docs/[category]/`
 
 Version: SuperClaude v4.0.0
-
-Credit @amgiiine