chat: better problems integration (#241276)

chat: allow referencing and dragging in diagnostics

- There is a new proposal which adds `ChatReferenceDiagnostic` as a
  prompt reference type
- You can now pick "Problems..." as part of the chat attachment context
- You can drag and drop files and individual diagnostics from the
  Problems view into chat. Previously trying to do this would just
  attach the file.

package.json

@@ -1,7 +1,7 @@
 {
   "name": "code-oss-dev",
   "version": "1.98.0",
-  "distro": "b37092a45bb95e5098cefcf6809fa6973cfd2538",
+  "distro": "18d6e62cad16da70804e341893ae344d5cdcc6ee",
   "author": {
     "name": "Microsoft Corporation"
   },