feat(editor): edgeless page block toolbar (#9707)

Close [BS-2315](https://linear.app/affine-design/issue/BS-2315/page-block-header)

### What Changes
- Add header toolbar to page block (the first note in canvas)
- Add e2e tests
- Add some edgeless e2e test utils.  **The package `@blocksuite/affine` was added to `"@affine-test/kit"`**

tests/kit/package.json

@@ -11,6 +11,7 @@
   },
   "devDependencies": {
     "@affine-tools/utils": "workspace:*",
+    "@blocksuite/affine": "workspace:*",
     "@node-rs/argon2": "^2.0.2",
     "@playwright/test": "=1.49.1",
     "express": "^4.21.2",