Add Podman Engine Support

[Virviil]

Description

Implement podman as an additional container engine, similar to the existing docker/nerdctl support.

Tasks

• Create src/sources/podman.rs following the existing engine pattern
• Implement the Source trait for PodmanSource
• Add podman detection and validation
• Handle podman-specific command syntax and output parsing
• Add podman to CLI engine selection options
• Add tests for podman engine functionality
• Update documentation with podman usage examples

Skills Required

• Rust programming
• Podman CLI knowledge
• Container technologies understanding
• Process execution and output parsing

Files to Create

• src/sources/podman.rs - Main podman engine implementation

Files to Modify

• src/sources/mod.rs - Add podman module
• CLI argument parsing - Add podman as engine option
• Integration tests

Implementation Notes

• Follow the same pattern as src/sources/docker.rs and src/sources/nerdctl.rs
• Podman commands are similar to Docker but may have different output formats
• Consider rootless podman usage scenarios
• Handle podman-specific error messages and edge cases

This is an intermediate task perfect for Hacktoberfest! 🎃

Hacktoberfest 2025 🍂