Tests: Move AK tests to Tests/AK

Author: https://github.com/bgianfo
Commit: 67322b0702
Pull-request: https://github.com/SerenityOS/serenity/pull/6891

Tests/AK/TestBadge.cpp

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2021, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibTest/TestCase.h>
+
+#include <AK/Badge.h>
+
+TEST_CASE(should_provide_underlying_type)
+{
+    static_assert(IsSame<int, Badge<int>::Type>);
+}