Link to UKWA to find examples based on file extension, initial bytes, etc.

[anjackson]

A bit like https://github.com/exponential-decay/moonshine but using a TBA/forthcoming UKWA API to make it easy to search for examples of different formats.

Currently e.g. https://www.webarchive.org.uk/shine/search?query=content_ffb:%221a000003%22+OR+content_ffb:%221a000004%22&facet.in.content_type_ext=%22bin%22