leenfetch 1.2.1

Fast, minimal, customizable system info tool in Rust (Neofetch alternative)
Documentation
## What does this PR do?

<!-- One or two sentences. What changed and why? -->

## Type of Change

- [ ] Bug fix
- [ ] New feature
- [ ] Refactor / cleanup
- [ ] Documentation
- [ ] CI / build
- [ ] Other: ___

## Related Issues

<!-- Link any issues this closes or relates to. -->
<!-- e.g. Closes #42 -->

## Testing

<!-- How did you verify this works? What platforms did you test on? -->

- [ ] Tested on Linux
- [ ] Tested on Windows
- [ ] Tested with default config
- [ ] Tested with custom config

## Checklist

- [ ] `cargo build` passes
- [ ] `cargo test` passes
- [ ] `cargo clippy -- -D warnings` passes
- [ ] `cargo fmt` applied
- [ ] CHANGELOG.md updated (for user-visible changes)