feat(style): Runtime theme generation

### Feature Description

The ability to generate theme based on a seed color at runtime instead of compile time.

### Use Case

This is very common in native android apps and would also benefit ionic/capacitor user to make their app feel more native

The issue names no files, tests, or entry points. Start by locating the existing compile-time theme generation implementation in the Angular components repository, then define how a seed color should produce themes at runtime and validate the behavior for Ionic and Capacitor use cases.

Written by the indexing model from the issue text.