Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibJS/Tests/functions/function-missing-arg.js

@@ -0,0 +1,10 @@
+test("basic functionality", () => {
+    function foo(a, b) {
+        return a + b;
+    }
+
+    expect(foo()).toBeNaN();
+    expect(foo(1)).toBeNaN();
+    expect(foo(2, 3)).toBe(5);
+    expect(foo(2, 3, 4)).toBe(5);
+});