Phase 4: Switch to Copier

Clean up Cookiecutter code after successful migration to Copier.

Tasks

• Delete cookiecutter-aegis-project/ template directory
• Remove cookiecutter from project dependencies
• Clean up old Cookiecutter template generation code
• Update CI/CD pipelines to remove Cookiecutter testing
• Simplify template testing to Copier-only
• Update build and packaging configs

Acceptance Criteria

• Cookiecutter code completely removed
• Dependencies cleaned up
• CI/CD simplified
• No dead code remaining
• Package size reduced

Success Metrics

• Cleaner codebase
• Reduced dependencies
• Faster CI builds
• Simplified maintenance