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

Feature Description

Hi, old AGM - 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

<agm-map
    [latitude]="latitude"
    [longitude]="longitude"
    (mapReady)="onMapReady($event)"
>
    <agm-polygon
        *ngFor="let shape of shapes"
        [paths]="shape.paths"
        [strokeColor]="getColor(shape)"
        [strokeWeight]="shape.zIndex === 1 ? 3 : 1"
        [fillColor]="getColor(shape)"
        [fillOpacity]="getOpacity(shape)"
        [editable]="shape.editable"
        [zIndex]="shape.zIndex"
        (polyMouseOver)="polyMouseOver($event, shape.shapeName)"
        (polyMouseOut)="polyMouseOut()"
        (polyClick)="polyClick($event, shape)"
        (polyPathsChange)="polyPathsChange($event)"
        (polyRightClick)="polyRightClick($event, shape)"
    >
    </agm-polygon>
</agm-map>

New implementation with google-map

<google-map
    [options]="mapOptions"
    (mapInitialized)="onMapReady($event)"
    (mouseout)="onMapMouseOut()"
>
    <map-polygon
        *ngFor="let shape of shapes"
        [paths]="shape.paths"
        [options]="{
            strokeColor: getColor(shape),
            strokeWeight: shape.zIndex === 1 ? 3 : 1,
            fillColor: getColor(shape),
            fillOpacity: getOpacity(shape),
            zIndex: shape.zIndex,
            editable: shape.editable
        }"
        (polygonMouseover)="polyMouseOver($event, shape.shapeName)"
        (polygonMouseout)="polyMouseOut()"
        (polygonClick)="polyClick($event, shape)"
        (polygonRightclick)="polyRightClick($event, shape)"
    >
    </map-polygon>
</google-map>

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.

Comienza con el componente map-polygon y compara sus eventos de polígono disponibles con la implementación de polígono AGM referenciada en packages/core/src/lib/directives/polygon.ts#L197. Rastrea cómo se exponen los cambios en la ruta de un polígono editable y, después, verifica que el nuevo evento polygonPathsChange informe de los cambios de la forma esperada para el ejemplo de migración.