v1.1.0 - .pth file detection & sudo-free execution

New features:
- Runs without sudo using Linux capabilities (CAP_BPF)
- .pth file planting detection (keip install, keip scan, keip python)
- Safe python execution wrapper with threat blocking

Improvements:
- Added .gitignore
- Fixed venv ownership in setup.sh
- Whitelist for safe .pth files (setuptools, namespace packages)
- Removed __pycache__ from repo

initial release v1.0.0