feat: initial project with Phase 1 complete

app/Http/Controllers/Admin/MailwizzApiController.php

@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Http\Controllers\Admin;
+
+use App\Http\Controllers\Controller;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Http;
+
+class MailwizzApiController extends Controller
+{
+    public function lists(Request $request): JsonResponse
+    {
+        $request->validate(['api_key' => 'required|string']);
+
+        $response = Http::withHeaders([
+            'X-Api-Key' => $request->api_key,
+        ])->get('https://www.mailwizz.nl/api/lists');
+
+        if ($response->failed()) {
+            return response()->json(['error' => 'Invalid API key or connection failed'], 422);
+        }
+
+        return response()->json($response->json());
+    }
+
+    public function fields(Request $request): JsonResponse
+    {
+        $request->validate([
+            'api_key' => 'required|string',
+            'list_uid' => 'required|string',
+        ]);
+
+        $response = Http::withHeaders([
+            'X-Api-Key' => $request->api_key,
+        ])->get("https://www.mailwizz.nl/api/lists/{$request->list_uid}/fields");
+
+        if ($response->failed()) {
+            return response()->json(['error' => 'Failed to fetch list fields'], 422);
+        }
+
+        return response()->json($response->json());
+    }
+}