CLI interface

[ToaHartor]

Add more options plz

[ToaHartor]

Some ideas :

• [ ] New command : decryption only for HCA (with the ability to specify the keys, autodetect if extracted from GI), if some people have a HCA player 🤷
• [ ] No cleanup option everywhere
• [ ] Add a verbosity option
• [ ] Keys option for the HCA decryption and convertion

Interrogations :

• Single command for demuxing a single USM and a folder ? ~~because this is basically the same thing~~. That would be more intuitive. The idea would be to have, like the HCA input for the convertHca command, a FileSystemInfo object instead of a DirectoryInfo or FileInfo.
• Same as above, but for the output folder : instead have a FileSystemInfo object, match if the input is a folder or directory, and act accordingly.

Suggested improvements :

• #10