feat(#129): add iCal response parser

app/Services/Plugin/Parsers/JsonOrTextResponseParser.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Services\Plugin\Parsers;
+
+use Exception;
+use Illuminate\Http\Client\Response;
+use Illuminate\Support\Facades\Log;
+
+class JsonOrTextResponseParser implements ResponseParser
+{
+    public function parse(Response $response): array
+    {
+        try {
+            $json = $response->json();
+            if ($json !== null) {
+                return $json;
+            }
+
+            return ['data' => $response->body()];
+        } catch (Exception $e) {
+            Log::warning('Failed to parse JSON response: '.$e->getMessage());
+
+            return ['error' => 'Failed to parse JSON response'];
+        }
+    }
+}