Add Template Creation Functionality in Admin Panel (#729)

* Add create template functionality in Admin Panel

- Implemented a new endpoint for creating templates in AdminController, utilizing the GenerateTemplate command.
- Added a form in the admin settings Vue component to allow users to input a template description and submit it.
- Enhanced the user experience with loading states and success/error alerts during template creation.

These changes facilitate the generation of new form templates directly from the admin interface, improving usability and functionality.

* Update template prompt validation length in AdminController

- Increased the maximum length of the 'template_prompt' field from 1000 to 4000 characters in the createTemplate method.

This change allows for more extensive template descriptions, enhancing the flexibility of template creation in the admin panel.

* Refactor template generation to use job-based approach

- Migrate template generation logic from the GenerateTemplate command to a new GenerateTemplateJob class for improved separation of concerns and better handling of asynchronous processing.
- Update AdminController to utilize the new job for generating templates, enhancing maintainability and clarity in the codebase.
- Remove unused dependencies and streamline the command's handle method for better performance and readability.

* fix lint

---------

Co-authored-by: Julien Nahum <julien@nahum.net>

api/app/Http/Controllers/Admin/AdminController.php

@@ -3,6 +3,7 @@
 namespace App\Http\Controllers\Admin;
 
 use App\Http\Controllers\Controller;
+use App\Jobs\Template\GenerateTemplateJob;
 use App\Models\Forms\Form;
 use App\Models\User;
 use Illuminate\Http\Request;
@@ -18,6 +19,20 @@ class AdminController extends Controller
         $this->middleware('moderator');
     }
 
+    public function createTemplate(Request $request)
+    {
+        $request->validate([
+            'template_prompt' => 'required|string|max:4000'
+        ]);
+
+        $job = new GenerateTemplateJob($request->template_prompt);
+        $job->handle();
+
+        return $this->success([
+            'template_slug' => $job->generatedTemplate?->slug ?? null
+        ]);
+    }
+
     public function fetchUser($identifier)
     {
         $user = null;