Run emacs garbage collection when idle.

This is to hopefully avoid running garbage collection while I am actively interacting with emacs, which should theoretically result in a smoother experience.

ansible/roles/vscode/files/settings.json

@@ -18,5 +18,6 @@
   "[python]": {
     "editor.defaultFormatter": "ms-python.black-formatter",
     "editor.formatOnSave": true
-  }
+  },
+  "black-formatter.importStrategy": "fromEnvironment"
 }