refactor(types): auto -> None sweep across entire codebase

Applied 236 return type annotations to functions with no return values
across 100+ files (core modules, tests, scripts, simulations).
Added Phase 4 to python_style_refactor track for remaining 597 items
(untyped params, vars, and functions with return values).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

debug_ast_2.py

@@ -2,7 +2,7 @@ import tree_sitter
 import tree_sitter_python
 
 class ASTParser:
- def __init__(self, language: str):
+ def __init__(self, language: str) -> None:
   self.language = tree_sitter.Language(tree_sitter_python.language())
   self.parser = tree_sitter.Parser(self.language)