Fix warnings and remove CodeMirror v5 dependency

Co-authored-by: tsnobip <[email protected]>

Author: Copilot

package-lock.json

@@ -27,7 +27,6 @@
     "@replit/codemirror-vim": "^6.3.0",
     "@rescript/react": "^0.14.0-rc.1",
     "@rescript/webapi": "^0.1.0-experimental-0b87498",
-    "codemirror": "^5.54.0",
     "docson": "^2.1.0",
     "escodegen": "^2.1.0",
     "eslint-config-next": "^13.1.1",

package.json

@@ -265,8 +265,8 @@ let make = (
   ~className: option<string>=?,
   ~style: option<ReactDOM.Style.t>=?,
   ~onChange: option<string => unit>=?,
-  ~onMarkerFocus: option<((int, int)) => unit>=?,
-  ~onMarkerFocusLeave: option<((int, int)) => unit>=?,
+  ~onMarkerFocus as _: option<((int, int)) => unit>=?,
+  ~onMarkerFocusLeave as _: option<((int, int)) => unit>=?,
   ~value: string,
   ~mode: string,
   ~readOnly=false,