Rework example components to not use styled-components

[DysphoricUnicorn]

Current Status

The example components shipped by this library rely on the non-ssr compatible, and no longer maintained, styled components library.
The components are also not very pretty, as they were mostly considered examples for functionality, but this means that the library tends to get a negative initial impression.

Should-Be Status

The components are rewritten using emotion, and made prettier in the process.

Acceptance Criteria

• The dependency on styled-components has been removed
• The components shipped by this library look so nice that we actually want to "advertise" it with them