feat: send email notifications on user mentions (#372)

* feat: add notifications schema

* chore: gen migration

* feat: add mention email template

* feat: add sendMentionEmail func

* feat: add repo funcs

* feat: update card router to send emails on mention

* fix: update the editor suggestion to show all members

* feat: skip pending members in sendMentionEmails

* feat: update comments to use tiptap editor

packages/db/migrations/meta/_journal.json

@@ -176,6 +176,13 @@
       "when": 1769983198190,
       "tag": "20260201215958_AddUserBoardFavouritesTable",
       "breakpoints": true
+    },
+    {
+      "idx": 25,
+      "version": "7",
+      "when": 1770500457005,
+      "tag": "20260207214056_AddNotificationsTable",
+      "breakpoints": true
     }
   ]
 }