Media Endpoint improvements

For the code, media related stuff is now in its own controller

Added support for querying the most recent file uploaded

app/Http/Responses/MicropubResponses.php

@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Http\Responses;
+
+use Illuminate\Http\JsonResponse;
+
+class MicropubResponses
+{
+    /**
+     * Generate a response to be returned when the token has insufficient scope.
+     *
+     * @return JsonResponse
+     */
+    public function insufficientScopeResponse(): JsonResponse
+    {
+        return response()->json([
+            'response' => 'error',
+            'error' => 'insufficient_scope',
+            'error_description' => 'The token’s scope does not have the necessary requirements.',
+        ], 401);
+    }
+
+    /**
+     * Generate a response to be returned when the token is invalid.
+     *
+     * @return JsonResponse
+     */
+    public function invalidTokenResponse(): JsonResponse
+    {
+        return response()->json([
+            'response' => 'error',
+            'error' => 'invalid_token',
+            'error_description' => 'The provided token did not pass validation',
+        ], 400);
+    }
+
+    /**
+     * Generate a response to be returned when the token has no scope.
+     *
+     * @return JsonResponse
+     */
+    public function tokenHasNoScopeResponse(): JsonResponse
+    {
+        return response()->json([
+            'response' => 'error',
+            'error' => 'invalid_request',
+            'error_description' => 'The provided token has no scopes',
+        ], 400);
+    }
+}