Add PyInstaller compatibility for diskpart script location handling

- Detect if running as PyInstaller executable using sys.frozen
- Use different directory priority order for PyInstaller vs development:
  - PyInstaller: prioritize user home directory and executable location
  - Development: prioritize current working directory
- Include executable directory (sys.executable) as fallback for PyInstaller
- Ensures diskpart script creation works reliably in both scenarios
- Addresses file access issues when running as compiled executable