Function applyTheme

applyTheme(theme: YarclShape, __namedParameters?: ApplyThemeOptions): void
Switches the whole app to another theme at runtime, without a rebuild.

Injects the theme's generated CSS (replacing the build-time styles) and makes components read their defaults (defaults, components, heading levels) from the theme, re-rendering them. The theme must define the keys your app uses; bundled themes share the defaults' keys (ThemeContract), so any of them can replace another.
Parameters
- theme: YarclShape
- __namedParameters: ApplyThemeOptions = {}
Returns void
Example
```
import { applyTheme } from 'yarcl/css';
import { themes } from 'yarcl/themes';

applyTheme(themes.editorial);
```