The `clementine` package is actually released under Apache license, but
requires the unfree `libspotify` package to build.
Now `nixpkgs.clementine` points to the free derivation and
`nixpkgs.clementineUnfree` has been introduced for the package bundled
with spotify support.
Fixes#38315
I was mainly considering Jellyfish and Jaguar (and Jackrabbit).
Originally I was inclined for Jellyfish, but then I thought of the
release T-shirts someone makes and it didn't seem suitable...
Jaguar would keep the name referring to a car as well, but as a
not-too-old (Mac) OS version is codenamed that way, I didn't go for it.