[Feature Request] Add subcommand aliases

[mrsobakin]

Hello! It would be great if we were able to use full command names instead of just the first letter. It would make the experience more git-like.

Here's the examples of what I mean:

• sortme_cli submit file.cpp
• sortme_cli S cpp
• sortme_cli config

Perhaps this idea could be extended to support interpreting a prefixes of a command, like sub->submit or ra->rating. However it's not as useful as simple aliasing.

Thanks.