Add first budget view

app/Api/V2/Controllers/Model/Budget/ListController.php

@@ -0,0 +1,45 @@
+<?php
+/*
+ * ListController.php
+ * Copyright (c) 2022 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+namespace FireflyIII\Api\V2\Controllers\Model\Budget;
+
+use FireflyIII\Api\V2\Controllers\Controller;
+use FireflyIII\Transformers\V2\BudgetTransformer;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Pagination\LengthAwarePaginator;
+use Illuminate\Support\Collection;
+
+class ListController extends Controller
+{
+    /**
+     * @return JsonResponse
+     */
+    public function index(): JsonResponse
+    {
+        $collection  = new Collection;
+        $paginator   = new LengthAwarePaginator($collection, 0, 50, 1);
+        $transformer = new BudgetTransformer();
+        return response()
+            ->api($this->jsonApiList('budgets', $paginator, $transformer))
+            ->header('Content-Type', self::CONTENT_TYPE);
+    }
+
+}