next - ui-lib - flatten css/modules/ directory

[elycruz]

Since our vanilla ui-library (./packages/atomic-ui-js), is a library (and not an app), the SMACSS "css/modules" directory is more than what we need. Additionally since it would make the library easier to grok/reference, the directory should be be flattened.

Acceptance Criteria

Flatten './css/modules/' to just './css/'.