Config file for repositories that use s2dm approach?

It might be advantageous to implement a mechanism that let the user of the `s2dm` approach configure certain things. For example:
- The default naming convention accepted in the graphql files.
- A default path to the specification files to run simplified commands.
- Specify the version of `s2dm` on which the controlled vocabulary (i.e., domain data model) is made.
- etc.

This is something common in `typescript` projects, where the `tsconfig.json` is located at the project`s root.