`Closure::bind()` scope binding improvements

[zonuexe]

WIP (This PR still doesn't work as intended)

• [x] Add bound scope to Name node (Closure::bind())
• [ ] Add bound scope to Name node (Closure::bindTo())
• [ ] Support const fetch
• [ ] Support static method call
• [ ] Fix ClassConstantRule
• [ ] Fix StaticMethodCallCheck
• [ ] Fix InstantiationRule