refactor(editor): new icon picker (#13658)

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

* **New Features**
* In-tree icon picker for Callout blocks (emoji, app icons, images) with
popup UI and editor-wide extension/service.
* Callout toolbar adds background color presets, an icon-picker action,
and a destructive Delete action.

* **Refactor**
* Replaced legacy emoji workflow with icon-based rendering, updated
state, styling, and lifecycle for callouts.

* **Tests**
  * Updated callout E2E to reflect new default icon and picker behavior.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

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Co-authored-by: L-Sun <zover.v@gmail.com>

package.json

@@ -82,7 +82,7 @@
     "husky": "^9.1.7",
     "lint-staged": "^16.0.0",
     "msw": "^2.6.8",
-    "oxlint": "^1.15.0",
+    "oxlint": "~1.18.0",
     "prettier": "^3.4.2",
     "semver": "^7.6.3",
     "serve": "^14.2.4",