Lint and Comb every Stencil component

Status: **Opened for visibility**
Reviewers: @jeffkamo @ry5n 

## Changes
- Added SCSS Lint and CSSComb rules to the root of the directory.
- Linted every file and subsequently ran comb. Then did a manual pass for readability in some places. This means Stencil does not 100% match our linting rules but I think it's okay to break from the norm here and there. For example, arrange is much more readable with each modifier being one line.

## Notes
- The version of CSSComb I used for this is still in development. The linter is ready to use. Should probably get a question written up on how to use it.