Feature: Add a keyboard shortcut to be able to open the repo of a generator

[JoshuaKGoldberg]

Splitting out of #352, and summarizing context:

The generator search in the yo CLI leaves a lot to be desired.
I just made it so that the generator description is shown in the search: f5ab6e9
This is how it currently looks:

But, I think we can do a lot better!

Some other things I think we should do:

• Add a keyboard shortcut to be able to open the repo of the generator so you can read more about it.

This idea is related to #188, which suggests adding a shortcut to update the generators. So whatever solution is first sent for one of these two issues should keep the other in mind.

Co-authored-by: @sindresorhus

[JoshuaKGoldberg]

...and now triaging as a maintainer: I'm also 👍 on this feature. It's not critical but does seem like a nice thing. WDYT @UlisesGascon?

[UlisesGascon]

Yeah! Good idea 👍