Feature request: batch conversion / accept CLI arguments

Hello!

Might already be in place, if that’s the case, feel free to close this.

Since it’s the best XM engine avaliable, it would be very cool if it was easy batch converting a large xm library. Easiest would be to add a cli argument for a single file, then via Bash or Python we could just let it process a folder or similar.

Thanks for an amazing effort with this!