Function ImageGalleryStyles

Returns {
    dummyIndex: { opacity: number };
    mainImgStyle: {
        borderRadius: string;
        height: string;
        objectFit: string;
        width: string;
    };
    swiperFadeLeft: { background: string; left: number };
    swiperFadeOverlay: {
        bottom: number;
        pointerEvents: string;
        position: string;
        top: number;
        width: string;
        zIndex: number;
    };
    swiperFadeRight: { background: string; right: number };
    thumbSwiperSlide: {
        alignItems: string;
        cursor: string;
        display: string;
        height: string;
        justifyContent: string;
        maxWidth: string;
        width: string;
    };
}