[Feature] Write out Typescript Types for Cloudinary Product Gallery Widget

[colbyfayock]

Feature Request

Is your feature request related to a problem? Please describe.

Work through the Product Gallery reference documentation to create a Type interface for the Product Gallery Widget

https://cloudinary.com/documentation/product_gallery_reference

This should look similar to how we've built the interface for the Video Player:

https://github.com/cloudinary-community/cloudinary-util/blob/main/packages/types/src/types/cloudinary-video-player.ts

And the Upload Widget:

https://github.com/cloudinary-community/cloudinary-util/blob/main/packages/types/src/types/cloudinary-upload-widget.ts

These types will live in the @cloudinary-util/types package, which live in:

https://github.com/cloudinary-community/cloudinary-util/tree/main/packages/types/src/types

[Mrinank-Bhowmick]

I am working on this issue 🚀