Rfc: inner class2

[withinboredom]

Summary by CodeRabbit

• New Features

  • Introduced enhanced inner class support, enabling nested class declarations with refined access and scope restrictions.
  • Delivered new reflection methods (e.g., for checking if a class is inner, private, protected, or public) to improve class introspection.

• Bug Fixes

  • Clarified error messages for invalid class declarations and improper instantiation from the global scope.
  • Improved enforcement of visibility rules and scope requirements during class instantiation.

• Tests

  • Added extensive tests covering inner class declarations, inheritance, access modifiers, return types, autoloading, and reflection.