feat(editor): add frame title and mobile toolbar widget extension (#11996)

Closes: BS-3223
Closes: BS-3224

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

- **New Features**
  - Introduced new view extensions for frame title and keyboard toolbar widgets with conditional registration based on context and environment.
  - Enhanced widget integration by adding explicit exports for view components.

- **Chores**
  - Updated export paths and package dependencies to improve modularity and compatibility.
  - Removed deprecated widget dependencies and related imports from core packages.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/widgets/keyboard-toolbar/package.json

@@ -21,6 +21,7 @@
     "@blocksuite/affine-block-surface": "workspace:*",
     "@blocksuite/affine-block-surface-ref": "workspace:*",
     "@blocksuite/affine-components": "workspace:*",
+    "@blocksuite/affine-ext-loader": "workspace:*",
     "@blocksuite/affine-fragment-doc-title": "workspace:*",
     "@blocksuite/affine-inline-latex": "workspace:*",
     "@blocksuite/affine-inline-link": "workspace:*",
@@ -45,7 +46,8 @@
   },
   "exports": {
     ".": "./src/index.ts",
-    "./effects": "./src/effects.ts"
+    "./effects": "./src/effects.ts",
+    "./view": "./src/view.ts"
   },
   "files": [
     "src",