feat(editor): mindmap gfx extension (#11936)

Closes: BS-3209

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

- **New Features**
  - Introduced mind map view and store extensions, enhancing mind map integration and conversion to plain text and markdown formats.
  - Added priority property to quick tools, allowing for custom ordering in the toolbar.
- **Improvements**
  - Toolbar quick tools are now sorted by priority for a more intuitive user experience.
  - Updated toolbar and extension configurations to streamline available tools and extensions.
- **Bug Fixes**
  - Conditional registration of certain components ensures correct behavior in edgeless mode.
- **Chores**
  - Updated dependencies and project references to improve module integration and maintainability.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/gfx/mindmap/tsconfig.json

@@ -12,6 +12,7 @@
     { "path": "../../blocks/image" },
     { "path": "../../blocks/surface" },
     { "path": "../../components" },
+    { "path": "../../ext-loader" },
     { "path": "../connector" },
     { "path": "../shape" },
     { "path": "../text" },