Milestone M1 — Static PE Inspection

Issue: #4 (https://github.com/joelvaneenwyk/py-launch-lab/issues/4)

Description

Implement static PE header inspection so the project can classify any Windows executable as GUI-subsystem or console-subsystem. This is the foundational analysis layer that all later milestones depend on.

How it Works

1. Read the PE (Portable Executable) header from a given .exe file
2. Extract the IMAGE_SUBSYSTEM field from the optional header
3. Classify the executable as IMAGE_SUBSYSTEM_WINDOWS_GUI or IMAGE_SUBSYSTEM_WINDOWS_CUI
4. Store the result in a pe_subsystem field on the scenario result object

Tasks

• [ ] Implement inspect_pe.py: read PE header from any Windows EXE
• [ ] Classify IMAGE_SUBSYSTEM_WINDOWS_GUI vs IMAGE_SUBSYSTEM_WINDOWS_CUI
• [ ] Support inspection of Python, PythonW, uv, uvw executables
• [ ] Store pe_subsystem field in result objects
• [ ] Unit tests for PE inspection against known executables

Next Steps

• [ ] Verify PE parsing against CPython python.exe and pythonw.exe
• [ ] Confirm uv and uvw executables are correctly classified
• [ ] Ensure graceful handling on non-Windows platforms