Support user choice for time-based media

[edsilv]

When the manifest provides alternate versions of time-based media with a Choice in the manifest, we need to surface this in the UI as a drop down box or similar.

Example manifest: https://iiif-commons.github.io/iiif-av-component/examples/data/iiif/lunchroom-manners.json

[LlGC-szw]

All issues will be triaged for further investigation or closure by the 28 September 2023. If your issue is still relevant and would like for it be investigated further please comment by 14 September 2023.