docs: add comprehensive cortex-cli code analysis report

This analysis covers:
- 5 critical issues including version inconsistencies and unimplemented features
- 8 security concerns including API key handling and path validation
- 15 code quality issues including unwrap usage and code duplication
- 12 error handling improvements
- 6 performance considerations
- 8 documentation gaps
- Missing features and inconsistencies

The report provides prioritized recommendations for improvements.

Author: factorydroid