Added the enum and regex for when a branch rename command fails

[ysabri]

So I noticed that the rename branch error is not included and added it.

I can submit more if I find any, unless that is something the project is not looking for?

[shiftkey]

@ysabri that CI error is unrelated to your changes, but would you be able to add a test to git-process-test.ts that includes the whole Git output from this error, to confirm the regex is being captured correctly?

[ysabri]

I just added the test, let me know if there is anything else I need to do.

[shiftkey]

Thanks for the contribution @ysabri!