[Feature] Distinguish pre-releases from regular releases on the Downloads page

[ShaneBeee]

Is your feature request related to a problem?

Yes.
Recently I reported the 1.19.3 pack for missing textures, not realizing this was a pre-release:
see Faithful-Resource-Pack/Faithful-32x-Java#24

Describe the feature you'd like

Would be lovely to see if the release was a pre-release opposed to a regular release.

Screenshot(s)

No response

Notes

No response

[3vorp]

the site rewrite is redoing the formatting of the download page meaning this won't really be necessary anymore under the new proposed layout (see #85 for more info)

[3vorp]

Support has been added in a02dc53, but someone still needs to go through and re-categorize the current prereleases under the new system.

[3vorp]

completed with 8c2dc01