refactor: better php8 usage

- Change simple property init and assign to constructor promotion
- Remove unused variable in catch()
- Change docs types to union types, where possible

app/Http/Controllers/Staff/ChatBotController.php

@@ -27,10 +27,8 @@ class ChatBotController extends Controller
      * Display a listing of the Bots resource.
      *
      * @param null $hash
-     *
-     * @return \Illuminate\Contracts\Foundation\Application|\Illuminate\Contracts\View\Factory|\Illuminate\View\View
      */
-    public function index($hash = null)
+    public function index($hash = null): \Illuminate\Contracts\Foundation\Application|\Illuminate\Contracts\View\Factory|\Illuminate\View\View
     {
         $bots = Bot::orderBy('position', 'ASC')->get();
 
@@ -42,12 +40,10 @@ class ChatBotController extends Controller
     /**
      * Show the form for editing the specified Bot resource.
      *
-     * @param \Illuminate\Http\Request $request
      * @param int                      $id
      *
-     * @return \Illuminate\Contracts\Foundation\Application|\Illuminate\Contracts\View\Factory|\Illuminate\View\View
      */
-    public function edit(Request $request, $id)
+    public function edit(Request $request, $id): \Illuminate\Contracts\Foundation\Application|\Illuminate\Contracts\View\Factory|\Illuminate\View\View
     {
         $user = $request->user();
         $bot = Bot::findOrFail($id);
@@ -61,9 +57,7 @@ class ChatBotController extends Controller
     /**
      * Update the specified Bot resource in storage.
      *
-     * @param \Illuminate\Http\Request $request
      * @param int                      $id
-     *
      * @return \Illuminate\Http\Response
      */
     public function update(Request $request, $id)