LibJS: Reorganize tests into subfolders

Author: https://github.com/mattco98
Commit: 4c48c9d69d
Pull-request: https://github.com/SerenityOS/serenity/pull/2681
Reviewed-by: https://github.com/linusg

Libraries/LibJS/Tests/builtins/Object/Object.js

@@ -0,0 +1,14 @@
+load("test-common.js");
+
+try {
+    assert(Object.length === 1);
+    assert(Object.name === "Object");
+    assert(Object.prototype.length === undefined);
+
+    assert(typeof Object() === "object");
+    assert(typeof new Object() === "object");
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}