Function setup

setup(options?: ApexGridSetupOptions): void
One-call convenience: registers <apex-grid> and adopts a default host stylesheet so the virtualizer has a bounded height. The grid is styled out-of-the-box via --ag-* CSS custom properties — no theme import needed.
Parameters
- options: ApexGridSetupOptions = {}
Returns void
Remarks
This is an additive alternative to the manual setup (import 'apex-grid/define' + host CSS). Idempotent — safe to call more than once; host styles are adopted only on the first call.

Customize the look by overriding --ag-* CSS variables (see the README). The deprecated ApexGridSetupOptions.theme option only forwards to igniteui-webcomponents and does not change the grid's appearance.
Example
```
import { setup } from 'apex-grid';
setup();
```
Example: Opt out of injected host styles:
```
setup({ hostStyles: false });
```