Refactor handle_return

[r41k0u]

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[r41k0u]

I have rescoped this PR to only refactor the handle_return part now, which has been done well.

[Copilot]

Pull Request Overview

This PR refactors the return statement handling functionality in a Python-to-BPF compiler by extracting return logic into separate utility modules and improving code organization.

Key changes:

• Extracted return handling logic from functions_pass.py into dedicated utility modules
• Enhanced expression evaluation to support binary operations and ctypes casting
• Added comprehensive test coverage for various return statement patterns

Reviewed Changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
pythonbpf/functions/return_utils.py	New utility module containing extracted return handling functions
pythonbpf/functions/functions_pass.py	Refactored to use new return handling utilities and updated imports
pythonbpf/functions/func_registry_handlers.py	New registry pattern for statement handlers
pythonbpf/expr_pass.py	Enhanced with ctypes casting and binary operation support
pythonbpf/type_deducer.py	Reorganized code structure and added ctypes validation function
pythonbpf/codegen.py	Updated import path for functions module
tests/passing_tests/return/*.py	Added test files covering various return scenarios

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