LibJS: Clarify Object (base class) construction somewhat

Divide the Object constructor into three variants:

- The regular one (takes an Object& prototype)
- One for use by GlobalObject
- One for use by objects without a prototype (e.g ObjectPrototype)

Libraries/LibJS/Runtime/BooleanObject.cpp

@@ -37,7 +37,7 @@ BooleanObject* BooleanObject::create(GlobalObject& global_object, bool value)
 }
 
 BooleanObject::BooleanObject(bool value, Object& prototype)
-    : Object(&prototype)
+    : Object(prototype)
     , m_value(value)
 {
 }