Closes: BS-3202
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced new root block store and view extensions, enhancing modularity and integration options for root block functionality.
- Exported the EdgelessLocker class for broader usage.
- **Improvements**
- Updated export paths for root block modules, enabling clearer and more flexible module access.
- Enhanced view extension setup to better tailor user interface and interactions based on context.
- **Removals**
- Removed legacy migrating store and view extension logic, streamlining extension management and reducing unused code.
- Removed multiple deprecated block specifications and common extension collections to simplify the codebase.
- Deleted AI page root block specification, retaining only lifecycle watcher functionality.
- **Chores**
- Updated dependencies and project references to support new extension loader integration.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Saul-Mirone