Generate and decode QR codes from the terminal.
```sh
cargo install --path crates/dee-qr
```
```sh
dee-qr generate "https://example.com" --out qr.png
dee-qr generate "hello" --format svg --out qr.svg --json
dee-qr generate "terminal demo" --format terminal
dee-qr decode qr.png
dee-qr decode qr.png --json
```
- -
Use `--json` for structured output.
```sh
dee-qr --help
dee-qr <command> --help
```