feat(dashboard): add Roles CRUD with permission-based menu filtering

- Roles CRUD: List/Create/Update/Delete actions, controller, requests
- Roles Vue pages: Index, Create, Edit (Options API, DashboardLayout)
- SidebarNav: filter menu items by user permissions via Inertia shared data
- HandleInertiaRequests: share permissions and roles arrays to frontend
- HttpKernel: register dashboard.permission middleware alias
- SidebarNavItem: add shield-check icon mapping

app/Ship/Kernels/HttpKernel.php

@@ -91,5 +91,6 @@ class HttpKernel extends LaravelHttpKernel
         'limit.post' => LimitPost::class,
         'form.time.period' => FormTimePeriodMiddleware::class,
         'vikon.refresh' => \App\Http\Middleware\VikonTokenRefresh::class,
+        'dashboard.permission' => \App\Ship\Middleware\CheckDashboardPermission::class,
     ];
 }