Add cursor labels

Author: Zsailer

package.json

@@ -55,6 +55,8 @@
         "watch:labextension": "jupyter labextension watch ."
     },
     "dependencies": {
+        "@codemirror/state": "^6.2.0",
+        "@codemirror/view": "^6.7.0",
         "@jupyterlab/application": "^4.0.0",
         "@jupyterlab/apputils": "^4.0.0",
         "@jupyterlab/docmanager": "^4.0.0",