Improve Rhapsode's build with newer tools, fix crashes in history infrastructure.

Merge branch 'main' of git.adrian.geek.nz:/srv/git/rhapsode into main

Ensure link labels are unique in about:version

Distinguish SoundEffects+ & mixkit licenses on about page.

Incorporate earcon for <mark> elements.

Normalize sfx format (reduce failure points).

Release Rhapsode 5!

Revert PocketSphinx integration.

Document licensing of sorting sounds.

Mark which column a table is sorted on.

Both for the listener (via audio cue) & generating descending links.

Release Rhapsode 4!

Add introductory messages.

Release Rhapsode v3 with hyperlinks

Specify the fallback license for the sound effects.

I was prompted to do some digging to find this.
elementary though relicenses it under the Unlicense.

Release Rhapsode2!

Implement Gemini!

Refactor Rhapsode to use new HURL APIs and more leniantly handle MIMEtypes.