[FR] Switch from Github OAuth to Github App

[esolitos]

What

Currently the GitButler integration to GitHub is setup to be an OAuth app, I would recommend switching to Github App instead. This still uses OAuth 2.0 and can take actions on behalf of a user, but offers a number of advantages.

Why

The Github App offers more granular access than the OAuth ones. One major concern is that once the OAuth app i granted access to an organization it has FULL access to all the repositories, so it it not possible to exclude some critical repositories from the access scope.

Additional info

• Docs: Differences between GitHub Apps and OAuth apps
• Migrating OAuth apps to GitHub Apps

[esolitos]

Regardless of what you are going to decide on this I want to thank you for the great work in building this software!

This is the first GUI I am pleased to use instead of the git CLI as it offers an actual advantage!