Related to: [BS-3143](https://linear.app/affine-design/issue/BS-3143/更新-loading-和错误样式)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced a unified resource controller for managing image and attachment resources, providing improved loading, error, and state handling.
- Added a visual loading indicator overlay to image blocks for better feedback during image loading.
- **Improvements**
- Simplified and centralized image and attachment state management, reducing redundant properties and manual state tracking.
- Updated fallback UI for image blocks with clearer titles, descriptions, and improved layout.
- Enhanced batch image block creation and download handling for improved efficiency.
- Refined image block accessibility with improved alt text and streamlined rendering logic.
- Centralized target model selection for image insertion in AI actions.
- Reordered CSS declarations without affecting styling.
- Improved reactive state tracking for blob upload/download operations in mock server.
- **Bug Fixes**
- Improved cleanup of object URLs to prevent resource leaks.
- Adjusted toolbar logic to more accurately reflect available actions based on image state.
- **Tests**
- Updated end-to-end tests to match new UI text and behaviors for image loading and error states.
- **Chores**
- Refactored internal logic and updated comments for clarity and maintainability.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes: [BS-3398](https://linear.app/affine-design/issue/BS-3398/实现资源控制器)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
## Summary by CodeRabbit
- **New Features**
- Introduced a ResourceController for centralized and reactive management of attachment resource states, improving error handling, loading indicators, and UI state resolution for attachments.
- Added public access to resource management utilities via new export paths.
- **Refactor**
- Streamlined attachment state management by replacing manual state tracking with the new ResourceController, simplifying code and enhancing maintainability.
- Updated rendering logic for attachments to use unified state objects for clearer UI feedback.
- Centralized blob URL creation and download state management within the ResourceController.
- **Chores**
- Updated dependencies and internal references to reflect the new resource management approach, ensuring consistency across packages.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
