[RFC][GSOC] Microproject Suggestion

Hi, so it came to my attention that GSOC applicants will need to submit a microproject to be considered. I was thinking about implementing the squash as a separate feature from rebase. I did not dig up enough in the mail history to know whether this was suggested before or not.

It would be something that looks like this:

I did not really think it through, yet, and I don't know what options could be put there so I am open to suggestions.

My motivation is quite simple. I think it is more intuitive. When someone first asked me to squash multiple commits before, the first thing I had in mind was `git squash`. It was kind of a disappointment that this was not its own command.

So does that sound like a good idea?