Support for git worktrees when checking out

[BChausse-GoTo]

Some context:
Using git worktrees is growing in popularity since it allows one to checkout multiple branches at once (which avoid having to stash changes when working on multiple branches/PRs at once). This is an example of how I (and I believe, many others) manage their git repositories:

./development-dir/my-first-repo/main
./development-dir/my-first-repo/feat-a-branch
./development-dir/my-first-repo/feat-b-branch
./development-dir/my-second-repo/main
./development-dir/my-second-repo/feat-a-branch
./development-dir/my-second-repo/feat-b-branch

If someone asks me to review changes and/or test something in their PR branch.
I don't have to stash my changes and can work on both in parallel.

The issue:
The current implementation for repoPaths in the config.yml to checkout PRs is quite one-dimensional doesn't account for it. If a worktree already exists for the branch to checkout, gh-dash responds with exit status 1 when it could simply point to the existing worktree directory. Also there is no way to configure gh-dash to create worktrees.

Feature request:
I would love a way to be able to manage PRs using git worktrees fro the gh-dash UI.
Here is a simple way I think this could be achieved using a double asterisk notation:

repoPaths: {
  ChausseBenjamin/*/*: ~/dev-dir/*/* # Use worktrees for every repo from that user/org
  torvalds/linux/*/*: ~/dev-dir/*/* # Use worktrees for this specific repository  
}