[Feature Request] "Add Worktree" dialogbox having option to specific new local branch

[dracan]

The "Add Worktree" dialogbox requires a local branch to already exist.

A very common usecase for worktrees is to create a new one for a quick change (without affecting your current work). So for this, in Fork, I have to do the following...

1. Create a new branch (remembering to untick the 'checkout' checkbox)
2. "View -> Add Worktree..."
3. Find my new branch in the dropdown

It would be useful if the "Add Worktree" dialogbox gave you an option to type in a new branch's name for that worktree.

This feature request, combined with #2215, would make working with Worktrees in Fork much better.