Feature description

Give Frostiful a dedicated path for all advancements in the advancement tab, rather than randomly splattering them around the vanilla tree. This will provide a small guide to the progression of Frostiful

Checklist:

• Add a new Frostiful advancement tree, either standalone or in the adventure tab
• Root Frostiful advancement is granted upon having a temperature below 10%
• Use this tree to guide progression in Frostiful more explicitly