chore: add command to generate actions

use `artisan make:action <name>` to generate final & readonly php class with execute method.

backend/app/Console/Commands/MakeActionCommand.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Console\Commands;
+
+use Illuminate\Console\GeneratorCommand;
+
+class MakeActionCommand extends GeneratorCommand
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'make:action {name}';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Create a new action class';
+
+    protected function getStub(): string
+    {
+        return base_path('stubs/action.stub');
+    }
+
+    protected function getDefaultNamespace($rootNamespace): string
+    {
+        return $rootNamespace.'\Actions';
+    }
+}

backend/stubs/action.stub

@@ -0,0 +1,14 @@
+<?php
+
+namespace {{ namespace }};
+
+final readonly class {{ class }}
+{
+    /**
+     * Execute the action.
+     */
+    public function execute()
+    {
+        // Your logic here
+    }
+}