feat(cloud): enable seat based pricing (#161)

* feat: setup subscriptions

* feat: prompt user to create subscription if inactive

* feat: update subscription when increasing/decreasing workspace members

* feat: rework upgrade

* chore: remove pricing notice

* chore: add translations

* chore: update proration comment

packages/db/migrations/meta/_journal.json

@@ -64,6 +64,13 @@
       "when": 1755094668761,
       "tag": "20250813141748_AddChecklistActivityTypes",
       "breakpoints": true
+    },
+    {
+      "idx": 9,
+      "version": "7",
+      "when": 1756803246096,
+      "tag": "20250902085406_AddSubscriptions",
+      "breakpoints": true
     }
   ]
 }