v0.3.9

• Windows support via platform abstraction:
  A dedicated Windows platform implementation is in place (including Scripts/, python.exe, pip.exe), and code paths now rely on platform-specific binary locations.

• Better pyvenv.cfg parsing:
  get_config now parses the file in a key-based manner, normalizes version strings, and uses base-executable or home to resolve paths; this stabilizes detection of the Python version, interpreter path, and site-packages mode.

• Requirements generation via subprocess:
  Saving requirements now uses the platform-specific Python binary and invokes pip freeze through subprocess.run, resulting in a more stable and explicitly controlled write process.

• Dependency tree view via pipdeptree removed:
  The action is buggy and no longer wired into the venv list detail menus (the menu entry remains commented out) until bugs are fixed.