Allow cloning local templates

[marius-se]

Currently vapor new --template ... only supports remote git repositories. Being able to load a template from a local filesystem would be great!

Describe the solution you'd like
vapor new --template file:///Users/marius/Developer/my-awesome-template

I think this could be quite helpful, especially for testing! :)

Let me know what you think and I can implement it.

[gwynne]

You can already do this; you just have to be more specific for Git's benefit (it's used to clone URLs being bare repos, not checkouts)- vapor new --template file:///Users/marius/Developer/my-awesome-template/.git

[gwynne]

(Leaving this open in case I've misremembered whether the above works and/or it has stopped working 😅.)