Write tool to output familiar file tree from Dhall

Created by: daxmc99

We have a nice understandable file layout in our deploy-sourcegraph-* repos. Dhall outputs to a flat list by default. We should write a wrapper function that manipulates the dhall output to match our existing repo structure.

• This tool should support excluding files, for example, not generating a service such as symbols to allow for direct edits of yaml.