Converts Adobe Colour Tables to `.pal` files.
```bash
cargo install act2pal
act2pal -i input.act -o output.pal
```
```rust
use act2pal::Colors;
let bytes = std::fs::read("input.act")?;
let colors = Colors::from_act(&bytes)?;
let pal = colors.to_pal_string()?;
std::fs::write("output.pal", pal)?;
```