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/strict-mode-errors.js

@@ -0,0 +1,19 @@
+"use strict";
+
+test("basic functionality", () => {
+    [true, false, "foo", 123, 123n, null, undefined].forEach(primitive => {
+        let description = `${typeof primitive} '${primitive}${
+            typeof primitive == "bigint" ? "n" : ""
+        }'`;
+        if (primitive == null) description = String(primitive);
+        expect(() => {
+            primitive.foo = "bar";
+        }).toThrowWithMessage(TypeError, `Cannot set property 'foo' of ${description}`);
+        expect(() => {
+            primitive[Symbol.hasInstance] = 123;
+        }).toThrowWithMessage(
+            TypeError,
+            `Cannot set property 'Symbol(Symbol.hasInstance)' of ${description}`
+        );
+    });
+});