Cataclysm-DDA experimental build 2024-06-23-1828

What's Changed

• Colt Python by @KeremBabaG in #74576
• Adds the Rossi Gallery by @Holli-Git in #74724
• Fix bug in gun variant validator script by @anothersimulacrum in #74727
• Rice material unification + MRE pluralization normalization by @Karol1223 in #74706
• Fixing raw copper wire weight consistency with copper by @SomeGuyIGues in #74702

Full Changelog: cdda-experimental-2024-06-23-1559...cdda-experimental-2024-06-23-1828