refactor(core): minimize comment editor (#12995)

#### PR Dependency Tree


* **PR #12995** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

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

* **New Features**
* Introduced a new clipboard module, making clipboard-related
functionality available for external use.
* Added a comprehensive extension system for the comment editor,
supporting rich text features, widgets, and configurable options.

* **Bug Fixes**
* Improved stability by ensuring comment highlighting features and
toolbar event subscriptions handle missing dependencies gracefully,
preventing potential runtime errors.

* **Refactor**
* Simplified comment editor view manager setup for easier configuration
and maintenance.

* **Chores**
* Updated package exports to expose new clipboard modules and
configurations.
* Removed confirm modal and portal-related logic from the comment editor
component.
* Adjusted temporary store creation to omit adding an extra surface
block under the root page.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/all/package.json

@@ -285,6 +285,7 @@
     "./sync": "./src/sync/index.ts",
     "./extensions/store": "./src/extensions/store.ts",
     "./extensions/view": "./src/extensions/view.ts",
+    "./foundation/clipboard": "./src/foundation/clipboard.ts",
     "./foundation/store": "./src/foundation/store.ts",
     "./foundation/view": "./src/foundation/view.ts"
   },