VS Code launch configuration to debug the user's Indiekit installation

[jackdbd]

This PR adds a template for a VS Code launch configuration that will be will materialize at .vscode/launch.json in the user's Indiekit installation after they run the create-indiekit CLI.

This file will allow the user to just press F5 and start debugging their Indiekit installation.

[jackdbd]

This is really interesting, and can see how it would help people onboard to the project! That said, I think it should be optional, much like adding Docker files to a project. We can do this by asking something like ‘Would you like to enable debugging in VS Code?’ as the final setup prompt.

I agree. Better to make it optional like Docker.