Mo-Variants 7.4.2 QOL & BugFixes

Changes:

• Change startup for the last time, now uses rrc prefix across all our packs
• Demon advancement is now the parent for Arch Demon Advancement
• Firefly now caps at 500 instead of 251

Fixes:

• Fixed Variants sometimes overwriting mobs from other smithed standard packs
• Fixed Giant Reinforcements being able to be custom mobs from other datapacks/mods
• Fix advancements using the wrong namespace (may reset advancements sorry)
• Checked the entire pack for any errors, unused or unnecessary files, and resolved them all
• A few/A lot not listed here, a lot was done/fixed in this update.