feat: add BrentPriceResource with 30-day line chart widget

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Filament/Resources/BrentPriceResource/Pages/ListBrentPrices.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Filament\Resources\BrentPriceResource\Pages;
+
+use App\Filament\Resources\BrentPriceResource;
+use App\Filament\Widgets\BrentPriceChartWidget;
+use Filament\Resources\Pages\ListRecords;
+
+class ListBrentPrices extends ListRecords
+{
+    protected static string $resource = BrentPriceResource::class;
+
+    protected function getHeaderActions(): array
+    {
+        return [];
+    }
+
+    protected function getHeaderWidgets(): array
+    {
+        return [
+            BrentPriceChartWidget::class,
+        ];
+    }
+}