feat(core): add error notification for block not found (#8254)

Closes [BS-1416](https://linear.app/affine-design/issue/BS-1416/被删除的白板或者-page-里的-block，访问其-link-to-block，跳转之后没有-toast-提示)

<div class='graphite__hidden'>
          <div>🎥 Video uploaded on Graphite:</div>
            <a href="https://app.graphite.dev/media/video/8ypiIKZXudF5a0tIgIzf/76e0e8d8-8685-41a2-abc8-79b330854a7e.mov">
              <img src="https://app.graphite.dev/api/v1/graphite/video/thumbnail/8ypiIKZXudF5a0tIgIzf/76e0e8d8-8685-41a2-abc8-79b330854a7e.mov">
            </a>
          </div>
<video src="https://graphite-user-uploaded-assets-prod.s3.amazonaws.com/8ypiIKZXudF5a0tIgIzf/76e0e8d8-8685-41a2-abc8-79b330854a7e.mov">Screen Recording 2024-09-13 at 21.09.20.mov</video>

packages/frontend/i18n/src/resources/en.json

@@ -1613,5 +1613,6 @@
   "unnamed": "unnamed",
   "upgradeBrowser": "Please upgrade to the latest version of Chrome for the best experience.",
   "will be moved to Trash": "{{title}} will be moved to trash",
-  "will delete member": "will delete member"
+  "will delete member": "will delete member",
+  "Block not found": "Block not found"
 }