FEATURE: prepare handlers for categories

app/Handlers/Contracts/BaseModuleHandler.php

@@ -0,0 +1,26 @@
+<?php
+namespace App\Handlers\Contracts;
+
+use App\Models\User;
+
+interface BaseModuleHandler
+{
+    public static function getModuleId();
+
+    /**
+     * Register admin menu (or multiple ones)
+     *
+     * This cannot be in ServiceProvider because Session is started at middleware. And ServiceProvider is called before
+     * starting any middleware..
+     *
+     * @param User $user model of logged user
+     */
+    public static function registerAdminMenu(User $user);
+
+    /**
+     * Install module
+     *
+     * @return mixed
+     */
+    public static function install();
+}