feat: add alias/metadata to transclude tag

[HyperEpsilon]

Simple feature that adds a transcluded link's alias to the html tag under data-embed-alias.

This aligns with the Obsidian method of adding the link alias to transcluded notes. Obsidian renders the transclusions as a <div> and uses the alt attribute, but as I don't believe alt is valid for <blockquote> I elected to go with data-embed-alias.

I'm not 100% on the name it should have, maybe it should just be data-alias or data-metadata.