Expose VideoViewerReferences like OSDReferences
OSDReferences is a list of ref to OpenSeadragon instances, used in Mirador as an image viewer. This commit exposes a VideoViewerReferences, to allows the annotations plugins to get video canvas dimensions and DOM element
- removed build warning
- disable "prepare" script to speed up build
ref https://gitlab.tetras-libre.fr/iiif/mirador-annotations/-/issues/1