Import tree-sitter to handle python files

[st01cs]

Replace python.ast with tree-sitter. This commit is just a replacement for python parser. If it works well, tree-sitter will support more language parser(C/C++, Java...)

[Umpire2018]

Thank you for your contribution and the effort you've put into this PR! I appreciate that you've included test cases and provided sufficient documentation for your changes.

Switching from ast to tree-sitter is indeed a great first step towards supporting multiple languages. However, I have some reservations about the implementation:

1. Dependency Concerns: The introduction of tree_sitter_languages adds a bundle of dependencies, which feels a bit heavy for this repository's current focus on Python. To keep things minimal and maintainable, I suggest directly using Python-specific dependencies, such as:

   from tree_sitter import Language, Parser
   import tree_sitter_python
   
   self.parser = Parser(Language(tree_sitter_python.language())

2. Future Considerations: While this change lays the groundwork for multi-language support, it might not result in a fundamental improvement without considering the entire workflow, especially given the presence of tools like jedi. A more holistic approach might be required to address all integration challenges.

That said, this is an excellent initiative, and I truly appreciate your effort. I won't close this PR but instead suggest continuing the discussion in #86 , Your insights and contribution to that conversation would be incredibly valuable.

Thank you again for your work, and I look forward to seeing where this discussion leads!