Clean Up the Root

[timwright12]

With the new webpack conversion we have a /config directory set up. Any config files, linting, processing, etc that can be moved out of the root and into the /config directory should be to clean up the root of the project.

Related plugin issue: 10up/plugin-scaffold#89

[cjkoepke]

@timwright12 This has already been updated, no? https://github.com/10up/theme-scaffold/tree/master/config

[samikeijonen]

@cjkoepke I think Tim ment also other than just Webpack related config files.