Moved from Recipes+, made by Danto_119 (me), to be a datapack on it's own
The datapack does not work if the world was created straight to creative, to use it on a creative map, start in survival with cheats on and set the gamemode to creative afterwards
The datapack is made for all neutral and hostile mobs (working on it)
Later, add for passive mobs
And other ideas I may come up with

Changed moster_slayer subfolder to hostile, neutral and passive
Absolute Salyer title for skeletons and zombies types
Butcher title for farm animals

05/10/2025
Remade the ones from my original file, next target is to set the 1000 kills ("Slayer Title") for all mobs, so the scoreboard would exist and may be partially seen, so I may post the datapack partially functionable as I wish.
Icon for all first kills to be the spawn egg

All hostile mobs have "Kill" and "Slayer" advancement, and all mobs have a scoreboard created

Version 1.0.1
06/10/2025
Added "Enderman Kill!" and "Spider Kill!"
"root" created for neutral mobs, not all neutral mobs will be there, some will still be on the "hostile" page
All neutral mobs have "the first kill" advancement, removed the dublicate of "trader_llama"

Version 1.0.2
07/10/2025
Solved "creeper" not showing on achievements tab
All passive mobs have a first kill advancement
Works for 1.21-1.21.10, below 1.21.6 the background is not shown

Version 1.0.3
06/01/2026
Added first kill achievements and scoreboards for 
passive:zombie_horse, camel_husk, 
neutral:nautilus, zombie_nautilus
hostile:parched

Version 1.1.0
08/01/2026
Added first kills achievements for bosses (Ender_Dragon and Wither)
Create "Absolute Zombie Slayer" advancement, gained by killing Zombies, Husks, Zombie Villagers, Zombified Piglins
Hidden "Ultimate Zombie Slayer" advancement
Both titles are added to "hostile" page, "Drowned" and "Zombfied Piglins" are switched to the "Hostile Page", to be next to the other zombie types, following the "Absolute Zombie Slayer" advancement
"Illager Collection" added 
Added the plural suffix to some titles that didn't have it
"Absolute Skeleton Slayer" and "Ultimate Skeleton Slayer" added, same as Zombies, they were all moved to share the same root
"Zombie Collection" and "Skeleton Collection" added, "Absolute" titles were moved on the "Adventure" page
Added "zoglin" for "Absolute Zombie" title as well, because of hostility, removed "zomfied_piglin" from it
12/01/2026
Added "Piglin Collection", piglin was moved from the passive advancement tab to hostile, the location in the code is the same, the root was changed
