feat(layout): Layout-Einstellungen, Dark-Mode, Logo, Hilfe-Menü

- Settings Key-Value Store (DB + Cache)
- Einstellungen → Layout: Seitenname, Logo, Button-Farbe, Dark/Light-Mode
- Hilfe-Menü (Ebene 0): Handbuch + Changelog im Browser
- Navigation erweitert: Einstellungen-Dropdown + Hilfe-Dropdown
- CHANGELOG v0.4.0

Version: 0.4.0

bootstrap/app.php

@@ -6,13 +6,20 @@ use Illuminate\Foundation\Configuration\Middleware;
 use Illuminate\Http\Request;
 
 return Application::configure(basePath: dirname(__DIR__))
+    ->withProviders([
+        App\Providers\SettingsServiceProvider::class,
+    ])
     ->withRouting(
         web: __DIR__.'/../routes/web.php',
         commands: __DIR__.'/../routes/console.php',
         health: '/up',
     )
     ->withMiddleware(function (Middleware $middleware): void {
-        //
+        $middleware->alias([
+            'role'       => \Spatie\Permission\Middleware\RoleMiddleware::class,
+            'permission' => \Spatie\Permission\Middleware\PermissionMiddleware::class,
+            'role_or_permission' => \Spatie\Permission\Middleware\RoleOrPermissionMiddleware::class,
+        ]);
     })
     ->withExceptions(function (Exceptions $exceptions): void {
         $exceptions->shouldRenderJsonWhen(