Closes: [BS-3555](https://linear.app/affine-design/issue/BS-3555/ui-attachment-loading-变量更新)
Closes: [BS-3559](https://linear.app/affine-design/issue/BS-3559/ui-图片-loading-变量更新)
### Dark
<img width="625" alt="Screenshot 2025-05-26 at 20 32 36" src="https://github.com/user-attachments/assets/93501e3d-8fc6-45f9-84a0-ac147e5c5f9f" />
### Light
<img width="623" alt="Screenshot 2025-05-26 at 20 32 25" src="https://github.com/user-attachments/assets/7d5bc128-6667-45b5-982d-dab3a22706a7" />
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Loading icons are now invoked as functions, allowing for more flexible and customizable rendering with parameters like size and progress.
- **Refactor**
- Replaced theme-dependent and static loading icon references with a unified `LoadingIcon()` component across multiple components and blocks.
- Removed legacy icon variants and simplified icon import statements, centralizing icon rendering logic.
- **Style**
- Updated styles for loading and reload buttons to use theme-aware CSS variables.
- Enlarged and repositioned loading indicators in image blocks for better visibility.
- **Bug Fixes**
- Achieved consistent loading icon rendering across various blocks and components by standardizing icon invocation.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes: BS-3393
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced a new "Embed Doc" block, enabling embedding and rendering of linked and synced documents within cards, including support for banners and note previews.
- Added new toolbar and quick search options for inserting embedded linked and synced documents.
- **Improvements**
- Updated dependencies and internal references to support the new embed doc functionality across related blocks and components.
- Enhanced support for edgeless environments with new clipboard and configuration options for embedded docs.
- **Refactor**
- Streamlined and reorganized embed-related code, moving linked and synced doc logic into a dedicated embed doc module.
- Removed obsolete adapter and utility files to simplify maintenance.
- **Chores**
- Updated project and TypeScript configuration files to include the new embed doc module in builds and references.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
fundon