Python transpiler - converts Python AST to Spydecy HIR

This module uses PyO3 to parse Python code into AST, then converts it to Spydecy's Unified HIR for cross-layer optimization.

Sprint 2 Deliverables

• Python AST parser (PyO3)
• Type hint extraction
• Python → HIR conversion
• First debugger feature: spydecy debug visualize python-ast