Improve build time

[SpaceK33z]

The build time is insanely high, because the rollup typescript plugin is doing very weird slow stuff.

Two ways to fix; first one to actually try to find the bottlenecks and see if we can improve it. Second one to just not bundle the whole ui-components to a single file. Maybe this is better anyway, but needs some research since it might increase build time for projects that use ui-components.