Update to use @civictheme/uikit

[Decipher]

Is your feature request related to a problem? Please describe.
The CivicTheme Components Library was renamed to UIKit and restrutured into a standalone project - see https://github.com/civictheme/uikit.

Describe the solution you'd like
Update to use the new library

Describe alternatives you've considered
N/A

Additional context
N/A