Add UI/UX for moving channels (#2976)

TODO:

- [x] Add drag and drop
- [x] Polish up in-flight decisions.
- [x] Fix chat panel panic
- [x] Add nice hover effect highlighting the matching ones
- [x] Fix and test keyboard

Release Notes:

- N/A

assets/keymaps/default.json

@@ -585,6 +585,14 @@
       "space": "menu::Confirm"
     }
   },
+  {
+    "context": "CollabPanel > Editor",
+    "bindings": {
+      "cmd-c": "collab_panel::StartLinkChannel",
+      "cmd-x": "collab_panel::StartMoveChannel",
+      "cmd-v": "collab_panel::MoveOrLinkToSelected"
+    }
+  },
   {
     "context": "ChannelModal",
     "bindings": {