feat(expressive modal): v1 & v2 guidance updates

[sangeethababu9223]

Related Ticket(s)

https://github.com/carbon-design-system/carbon-for-ibm-dotcom-website/issues/1616

Description

v1 & v2 guidance updates

Changelog

New

• Added behaviour section with details on Model position, Overflow and closing the modal

Changed

• Updated the default use case image with one from lightbox media viewer

Removed

• Removed use case image for large variant

[ibmdotcom-bot]

Deploy preview created: https://ibmdotcom-library.s3-web.us-south.cloud-object-storage.appdomain.cloud/deploy-previews/1731/index.html

Built with commit: 6890c487b92d08999a0e211b678d1d28c964e549

[sangeethababu9223]

@ariellalgilmore , Added images to the behaviour section.

[oliviaflory]

@sangeethababu9223 could you please look into adding the GIF player to your two GIFs? I think the light prop might be best but if you could try light for the first and dark for the second so we can see both that would be helpful.

We could take a static pull from your video files for the static image?

[sangeethababu9223]

@oliviaflory, Added Gif player as per your comment. Please check.

[oliviaflory]

It's perfect, thanks you @sangeethababu9223 !