DnT Ancient City Overhaul

## Anicent City Overhaul v4
 - Added 11 new Smaller Structure parts, inspired by Dungeons 2 Dungeons
 - Overhauled the loot tables:
   - the small houses roll for their own loot table now, not able to generate diamond gear/tools or the silence trim
   - houses also generate less loot in general
   - Temples generate more loot overall
   - the redstone lab under the Sift Portal got its own new loot table with redstone components
   - temples and houses have a 1/20 chance to roll for the vanilla loot table instead, to still work with mods.