Added middleware IsWebsiteTranslations and IsProject.

This fixes errors where Project or WebsiteTranslations are not found.

app/application/app/Http/Middleware/IsWebsiteTranslations.php

@@ -0,0 +1,25 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Middleware;
+
+use App\Services\WebsiteTranslations;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+final class IsWebsiteTranslations
+{
+    public function handle(Request $request, \Closure $next): Response
+    {
+        $websiteTranslations = $request->get('websiteTranslations');
+        if (\is_null($websiteTranslations)) {
+            \abort(Response::HTTP_NOT_FOUND);
+        }
+
+        if ($websiteTranslations instanceof WebsiteTranslations === false) {
+            \report("$websiteTranslations must be an instance of WebsiteTranslations");
+            \abort(Response::HTTP_NOT_FOUND);
+        }
+
+        return $next($request);
+    }
+}