Test setup for suitcss (doesn't work)

`@import "suitcss"` fails, not sure why. Also, since we removed the
`css-loader`, our app styles are no longer applying.
Undo suitcss/rework setup

This reverts the following commits:
- 1bdbe78c40c314cba700a22dd12d67bef13077b1
- 69082a55bc9c41285c54667bd25a3c4bc42ae8f6
- 968855ff3ea4089575f99c78e2e620770f2714c2
- 02be5179a3b1bf5f086c5110cd764b0f30d6a984