LibCore: Add swift bindings for EventLoop as an Executor and Actor

Author: https://github.com/ADKaster
Commit: c8787e6a9f
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/3880

Tests/LibCore/TestEventLoop.h

@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2025, Andrew Kaster <andrew@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+void install_thread_local_event_loop();