Moves specific list styles from base/defaults into modules/lists

Because the defaults are declared on the `<ul>` and `<ol>` tags, any classes qualifying those either need to be also tag-qualified, also declared inside this default file, or use `!important`. Those aren't great options. Moving these styles out into a modules file and only defining defaults on the naked `<ul>` and `<ol>` tags themselves allows any new classes to be extended more easily and work simultaneously on a single element without the ones declared in defaults *always* overpowering the others.