Improve AST Node Classes: Fix mutable default arguments and enhance r…

[Vruddhi18]

Improve AST Node Classes: Fix mutable default arguments and enhance readability

Summary

• Replaced mutable default arguments with None and initialized them inside constructors.
• Added type annotations for improved clarity and type checking.
• Enhanced repr methods for clearer and more informative string representations.

Changes

• Replaced mutable default arguments with None and initialized them inside constructors to prevent unintended side effects.
• Added type annotations to function parameters and return types for improved clarity and type safety.
• Enhanced repr methods across all AST node classes for clearer and more informative string representations, aiding in debugging and logging.

Testing

• Ran existing tests to ensure that no functionality was broken by the changes.
• No new tests were added as the changes were primarily refactoring and did not alter the core logic.
• Manually tested the AST node classes in a local environment to verify that the string representations and type annotations are functioning as expected.

Checklist

• Tests cover new or changed code (or reason why not)
• Only touched files related to the issue
• Everything builds and runs locally

[Vruddhi18]

@NripeshN @vaatsalya123 Please review this and let me know if there are any more changes needed.

[samthakur587]

LGTM 🚀
Thanks @Vruddhi18 for contributing here !