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/package.json

@@ -15,6 +15,7 @@
     "@blocksuite/affine-block-image": "workspace:*",
     "@blocksuite/affine-block-surface": "workspace:*",
     "@blocksuite/affine-components": "workspace:*",
+    "@blocksuite/affine-ext-loader": "workspace:*",
     "@blocksuite/affine-gfx-connector": "workspace:*",
     "@blocksuite/affine-gfx-shape": "workspace:*",
     "@blocksuite/affine-gfx-text": "workspace:*",
@@ -40,7 +41,9 @@
   },
   "exports": {
     ".": "./src/index.ts",
-    "./effects": "./src/effects.ts"
+    "./effects": "./src/effects.ts",
+    "./view": "./src/view.ts",
+    "./store": "./src/store.ts"
   },
   "files": [
     "src",