Move tree implementation out of collections store (#4763)

* refactor: attaching emoji in tree node is unnecessary

* refactor: pass depth and hasChildren as separate props

* refactor: move tree impl into a separate hook

* refactor: separate out as DocumentExplorer for reuse

* fix: separate search and node

* fix: review comments

* fix: tsc

app/models/Document.ts

@@ -2,12 +2,12 @@ import { addDays, differenceInDays } from "date-fns";
 import { floor } from "lodash";
 import { action, autorun, computed, observable, set } from "mobx";
 import { ExportContentType } from "@shared/types";
+import type { NavigationNode } from "@shared/types";
 import Storage from "@shared/utils/Storage";
 import parseTitle from "@shared/utils/parseTitle";
 import { isRTL } from "@shared/utils/rtl";
 import DocumentsStore from "~/stores/DocumentsStore";
 import User from "~/models/User";
-import type { NavigationNode } from "~/types";
 import { client } from "~/utils/ApiClient";
 import ParanoidModel from "./ParanoidModel";
 import View from "./View";