[Improvement] Allow pushing to a PR remote branch directly

[peaklabs-dev]

Currently when we authenticate with GitHub and check out a community PR, GitButler adds a new remote.

After I finish testing the PR locally, I often need to make small tweaks, like formatting for example and I would like to push them straight into the PRs source branch. Instead of doing that GitButler creates a branch with the same name on my origin which isn’t what I want. I want to push to the source branch of the PR (the branch where the PR was opened from) then after that I want to merge all changes into my target branch from the PR. It would be great if this would be an option or the new default, so my added commits go straight to the remote source branch not create a new branch on my origin which then means I have to create another PR which is just inconvenient.

Technically, this could probably be achieved by changing the remote configuration to the PR details, each time a PR is reviewed, but this is just very inconvenient and slow.

[Byron]

Thanks a lot for sharing.

I also think that the workflow around remote configuration should be improved so that normal Git features aren't circumvented.
For instance, when applying a PR branch or checking it out, I'd like to work with it just like the gh pr checkout tools allows to do.