close: BS-3431
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Added "Created By" property type and cell renderer, displaying creator's avatar and name in database blocks.
- Introduced "Created Time" property type and cell renderer, showing formatted creation timestamps.
- **Improvements**
- Enhanced table and Kanban views with improved column and row movement, hiding, and statistics capabilities.
- Streamlined property and row management with unified object handling and reactive signals for better performance and reliability.
- Improved avatar display logic to handle removed or unnamed users gracefully.
- Refactored property and row APIs to consolidate access patterns and support reactive updates.
- Updated icon retrieval and reactive value access for improved UI responsiveness in database and Kanban cells.
- Consolidated property and cell access methods to use "get or create" patterns ensuring consistent data availability.
- Added locking mechanism to stabilize computed signals during locked states.
- Modularized table and Kanban column and row abstractions for better encapsulation and maintainability.
- **Bug Fixes**
- Corrected row and column deletion, movement, and selection behaviors across table and Kanban views.
- Fixed issues with property and row referencing, ensuring consistent handling of identifiers and objects.
- Removed debugging logs and fixed method calls to align with updated APIs.
- **Style**
- Updated and simplified table column header styles for a cleaner appearance.
- **Chores**
- Added `@emotion/css` dependency for styling support.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **Refactor**
- Unified internal data access by replacing all references from `doc` to `store` across all components, blocks, widgets, and utilities. This affects how readonly state, block operations, and service retrieval are handled throughout the application.
- **Tests**
- Updated all test utilities and test cases to use `store` instead of `doc` for document-related operations.
- **Chores**
- Updated context providers and property names to reflect the change from `doc` to `store` for improved consistency and maintainability.
No user-facing features or behaviors have changed.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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