Draft: feat: implement development feature flag for AI Catalog
Relates to issue #571451 (closed)
This MR was created by Duo in Session 1131052
Changes
- Create development-type feature flag for incremental AI Catalog agent UI refactoring
- Set up new route structure for unified view/edit page experience
- Implement foundation for safe iterative development without breaking existing functionality
- Enable controlled switching between old drawer approach and new unified page