Add CatalogPlugin scaffold and EvCompany resource (T2.0, T2.1)

Registers CatalogPlugin with the admin panel so catalog Filament
resources auto-discover, and adds the EvCompany model/migration/
factory plus its Filament resource (auto-generated slug on create).

app/Providers/Filament/AdminPanelProvider.php

@@ -19,6 +19,7 @@ use Illuminate\Foundation\Http\Middleware\PreventRequestForgery;
 use Illuminate\Routing\Middleware\SubstituteBindings;
 use Illuminate\Session\Middleware\StartSession;
 use Illuminate\View\Middleware\ShareErrorsFromSession;
+use Modules\Catalog\CatalogPlugin;
 
 class AdminPanelProvider extends PanelProvider
 {
@@ -38,7 +39,9 @@ class AdminPanelProvider extends PanelProvider
                 NavigationGroup::make()->label('Operations'),
                 NavigationGroup::make()->label('Access'),
             ])
-            ->plugins([])
+            ->plugins([
+                CatalogPlugin::make(),
+            ])
             ->discoverResources(in: app_path('Filament/Resources'), for: 'App\Filament\Resources')
             ->discoverPages(in: app_path('Filament/Pages'), for: 'App\Filament\Pages')
             ->pages([