LibJS: Implement Object(value) constructor

Not sure why we didn't have this yet, it's super simple :^)

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

@@ -5,4 +5,9 @@ test("basic functionality", () => {
 
     expect(typeof Object()).toBe("object");
     expect(typeof new Object()).toBe("object");
+
+    expect(typeof Object(42)).toBe("object");
+    expect(Object(42).valueOf()).toBe(42);
+    expect(typeof Object("foo")).toBe("object");
+    expect(Object("foo").valueOf()).toBe("foo");
 });