feat: add empty controllers

app/Http/Controllers/AvailabilityController.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use Illuminate\Http\Request;
+
+class AvailabilityController extends Controller
+{
+    //
+}

app/Http/Controllers/HoldController.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use Illuminate\Http\Request;
+
+class HoldController extends Controller
+{
+    //
+}