feat: Add hint for operators, round to square, input variable, readable operator ID. #3056 (#3057)

### What problem does this PR solve?

feat: Add hint for operators, round to square, input variable, readable
operator ID. #3056

### Type of change

- [ ] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)
- [ ] Documentation Update
- [ ] Refactoring
- [ ] Performance Improvement
- [ ] Other (please describe):

web/src/pages/flow/utils.ts

@@ -236,3 +236,7 @@ export const getOtherFieldValues = (
 export const generateSwitchHandleText = (idx: number) => {
   return `Case ${idx + 1}`;
 };
+
+export const getNodeDragHandle = (nodeType?: string) => {
+  return nodeType === Operator.Note ? '.note-drag-handle' : undefined;
+};