country flags added and country switcher added

app/Http/Livewire/Tables/CityTable.php

@@ -3,11 +3,14 @@
 namespace App\Http\Livewire\Tables;
 
 use App\Models\City;
+use Illuminate\Database\Eloquent\Builder;
 use Rappasoft\LaravelLivewireTables\DataTableComponent;
 use Rappasoft\LaravelLivewireTables\Views\Column;
 
 class CityTable extends DataTableComponent
 {
+    public string $country;
+
     protected $model = City::class;
 
     public function configure(): void
@@ -23,4 +26,10 @@ class CityTable extends DataTableComponent
                   ->searchable(),
         ];
     }
+
+    public function builder(): Builder
+    {
+        return City::query()
+                   ->whereHas('country', fn($query) => $query->where('code', $this->country));
+    }
 }