feat(google-maps): Add support for polygonPathsChange event

### Feature Description

Hi, old [AGM - Angular Google Maps](https://github.com/sebholstein/angular-google-maps) has polygon paths change event and it is so useful. Now I'm converting my components from AGM to google-maps component but it does not support polygon paths change event. It would be great if this component support polygon paths change event like old agm component.

https://github.com/sebholstein/angular-google-maps/blob/340e3e35b60169b901842d0ca71c13944ad7fd2c/packages/core/src/lib/directives/polygon.ts#L197

My old implementation
```html

```

New implementation with google-map
```html

```

### Use Case

In my use case I control intersection and cover functionality with old component `polyPathsChange` event, now I can't control them with efficient way so it is super powerful and helpful feature to be when google-map support `polygonPathsChange` event itself as old component support.

Inizia con il componente map-polygon e confronta i suoi eventi del poligono disponibili con l’implementazione del poligono AGM referenziata in packages/core/src/lib/directives/polygon.ts#L197. Traccia come vengono esposte le modifiche al percorso del poligono modificabile, quindi verifica che il nuovo evento polygonPathsChange segnali le modifiche nel modo previsto per l’esempio di migrazione.

Scritto dal modello di indicizzazione a partire dal testo della issue.