feature: (gitbrowse) set a default remote

[ahmedelgabri]

Did you check the docs?

• [x] I have read all the snacks.nvim docs

Is your feature request related to a problem? Please describe.

I work in some repos with multiple remotes, and triggering Snacks.gitbrowse.open() always shows the picker to choose which origin to use.

I only care about origin 99.9% of the time.

Describe the solution you'd like

• Set snacks.gitbrowse.Fields.remote to origin by default and allow it to be overridden
• Or snacks.gitbrowse.Fields.remote to nil by default (to maintain current behavior) and allow it to be overridden

Describe alternatives you've considered

Getting rid of the remotes is not an option and I don't think there is a way around this in the current state?

Additional context

No response