Add worktree stuck at _Select remote branch to track_ when no remotes are configured

[msftrncs]

Git Worktree seems to get stuck when a repository is local only, when attempting to add a worktree to a blank repository that doesn't have any remotes configured, at a prompt of Select remote branch to track

Git Worktree 1.3.2
Automatically push worktrees to remote is set to 'ask'.
Should include remote branches when creating worktrees was unchecked.

My expectation was that I could at least get a new worktree (and in this case a new branch) without a remote, as I can connect remotes later on.

[philstainer]

Similar to this comment here: #19 (comment)

Currently the extension wants you to prefer remote tracking of branches and really wants you to push to remote so it can setup the worktree correctly.

You can think of the tracking branch as the base branch for the branch/worktree, so excluding remote branches will result in an empty list.

Maybe we could have an option to include local branches in that list as well.