Close [BS-3507](https://linear.app/affine-design/issue/BS-3507/edgeless-text-颜色无法-undoredo)
Close [BS-3426](https://linear.app/affine-design/issue/BS-3426/frame-修改背景色后不能撤销)
This PR fixes the issue where the color change of edgeless blocks could not be undone/redone, including notes, edgeless-text, and frames. It also addresses the problem of a tiny shape being unexpectedly retained on the canvas. The key changes are:
- Removal of `transact` from the `pop` method of edgeless elements.
- Refactoring of `onPickColor` for all edgeless elements and blocks to better control the lifecycle of custom color property changes.
- Addition of the missing custom background color feature for notes.
- Addition of undo/redo color tests for notes, frames, and edgeless-text.
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Added undo and redo support for color changes in frames, notes, and text blocks, allowing users to revert or reapply background and text color modifications.
- **Bug Fixes**
- Improved reliability of color picker interactions, ensuring consistent state management and transactional updates during color changes.
- **Tests**
- Introduced new end-to-end tests to verify undo/redo functionality for color changes in frames, notes, and text blocks.
- **Refactor**
- Streamlined color picker event handling for better maintainability and consistency across toolbars and style panels.
- Updated style panel structure and event handling for improved interaction and state management.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Closes: [BS-3511](https://linear.app/affine-design/issue/BS-3511/当选中-connector-时，toolbar-上文字颜色选项颜色显示不正确)
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **Tests**
- Added end-to-end tests for the edgeless connector feature, verifying toolbar text color functionality and theme-based color changes.
- **Refactor**
- Improved performance of text toolbar actions by optimizing internal data handling for font and color selection. No changes to visible behavior.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
L-Sun