Add a way to address PR review's comments

[TomasTomecek]

Right now, when my PR gets a review, I need to look into webui to see what I need to change and then find files and do the changes. I would love to get something like this:

$ upsint address-review $ID

upsint would open vim, navigate to respective files and show me the review comments

or alternatively show me in the command line what I need to change

this could even be part of the status command when a pr is checked out