full TS implementation on createTree.tsx

Co-authored-by: Mark Teets <markteets@gmail.com>
Co-authored-by: Jasmine <jasnoo@users.noreply.github.com>
Co-authored-by: Minzo Kim <minzo-kim@users.noreply.github.com>

Author: 4 people

src/backend/controllers/createTree.ts

@@ -34,7 +34,7 @@ import {
  */
 // TODO: Not sure why the ritd need to be outside of the _createTree function. Want to put inside, but in case this need to be keep track for front end.
 export default function createTree(currentFiberNode: Fiber): Tree {
-  let rtidCounter = 0;
+  let rtidCounter: number = 0;
   return _createTree(currentFiberNode, new Tree('root', 'root'));
 
   /**