Refactor: Datasets UI #3221 (#8349)

### What problem does this PR solve?

Refactor Datasets UI #3221.
### Type of change

- [X] New Feature (non-breaking change which adds functionality)

web/src/pages/chunk/parsed-result/knowledge-chunk/utils.ts

@@ -0,0 +1,24 @@
+export type FormListItem = {
+  frequency: number;
+  tag: string;
+};
+
+export function transformTagFeaturesArrayToObject(
+  list: Array<FormListItem> = [],
+) {
+  return list.reduce<Record<string, number>>((pre, cur) => {
+    pre[cur.tag] = cur.frequency;
+
+    return pre;
+  }, {});
+}
+
+export function transformTagFeaturesObjectToArray(
+  object: Record<string, number> = {},
+) {
+  return Object.keys(object).reduce<Array<FormListItem>>((pre, key) => {
+    pre.push({ frequency: object[key], tag: key });
+
+    return pre;
+  }, []);
+}