Make eslint work with or without prettier

[Ethan-Arrowood]

Right now the eslint config requires a prettier config file to exist in the root of the consuming repo. We should fix this so that it can either use the prettier config included here, or the users only if specified. Some only specify prettier within the package.json too so it may need some interesting logic to support.

[dillardm89]

I think is is at least partially addressed with the updates to eslint for typescript support. I added code to resolve the eslint prettier config to the @harperdb/code-guidelines file, rather than requiring the consuming repo to have a prettier config locally. The next step would be allowing user's local prettier config to extend / override the harper config.