Add configuration option to hide official templates

Introduce a new environment variable and configuration option to allow users to hide official templates in the template gallery. This provides more flexibility for self-hosted instances of OpnForm.

api/app/Http/Controllers/Forms/TemplateController.php

@@ -14,7 +14,7 @@ class TemplateController extends Controller
 {
     private function getProdTemplates($slug = false)
     {
-        if (!config('app.self_hosted')) {
+        if (!config('app.self_hosted') || !config('opnform.show_official_templates')) {
             return [];
         }
 

api/config/opnform.php

@@ -5,4 +5,5 @@ return [
     'moderator_emails' => explode(',', env('MODERATOR_EMAILS') ?? ''),
     'template_editor_emails' => explode(',', env('TEMPLATE_EDITOR_EMAILS') ?? ''),
     'extra_pro_users_emails' => explode(',', env('EXTRA_PRO_USERS_EMAILS') ?? ''),
+    'show_official_templates' => env('SHOW_OFFICIAL_TEMPLATES', true),
 ];

docs/configuration/environment-variables.mdx

@@ -47,6 +47,7 @@ There are dedicated configuration pages available for more detailed setup instru
 | `TEMPLATE_EDITOR_EMAILS`     | Comma-separated list of template editor emails.  |
 | `EXTRA_PRO_USERS_EMAILS`     | Comma-separated list of extra pro user emails.   |
 | `MODERATOR_EMAILS`           | Comma-separated list of moderator email addresses. |
+| `SHOW_OFFICIAL_TEMPLATES`    | Set to `false` to hide official templates from OpnForm's template gallery (defaults to `true`). |
 
 
 ## Front-end Environment Variables