Add Windows Platform Support

[Virviil]

Description

Ensure oci2git works properly on Windows with proper path handling, container engine detection, and Windows-specific considerations.

Tasks

• Fix path handling for Windows (backslashes vs forward slashes)
• Add Windows-specific container engine detection (Docker Desktop, Podman Desktop)
• Handle Windows file permissions and temporary directory creation
• Test and fix Git operations on Windows
• Add Windows-specific error handling and user guidance
• Update CI to test on Windows platforms
• Add Windows installation instructions to README

Skills Required

• Rust programming with Windows focus
• Windows development experience
• Cross-platform coding best practices
• Understanding of Windows container ecosystems

Platform Considerations

• Path separators and case sensitivity
• Windows container engine variations (Docker Desktop, WSL2, etc.)
• File permissions and security contexts
• Temporary directory handling (TEMP/TMP environment variables)
• Windows-specific Git behavior

Files to Focus On

• Path handling throughout the codebase
• Container engine detection logic
• Temporary file/directory creation
• Error messages and user guidance

Testing

• Ensure CI includes Windows testing
• Test with different Windows container setups
• Validate with Windows Subsystem for Linux (WSL) scenarios

This is an intermediate task perfect for Hacktoberfest! 🎃

Hacktoberfest 2025 🍂