Data Packing Jam #1 - Mining and Maurauding

Submission to Data Packing Jam #1 (Theme - Caves/Underground)

Features

Custom generation
- Ice/sand caves spawn occasionally around Y=30
- 'Spelunker Bases' spawn rarely at Y=20
  - Includes a Spelunker Miner and Spelunker Scientist, with custom trades
- To see when and where these spawn, run tag @s add mau_chunk_debug and load new chunks
Custom mobs
- Undead Miner
  - Spawns at the same rate as Zombies below Y=20
  - Drops the Miner's Helmet, which gives the player night vision when equipped
- Ember Demon
  - Spawns at the same rate as Skeletons below Y=20
- Ore Spirits
  - Spawn when breaking ore blocks
  - Attack you through blocks
  - Drop their respective ore block and a Spirit Orb (see below)
Custom Items
- Spirit Orb
  - Drops from Ore Spirits
  - When dropped with a pickaxe on to a Smithing Table, it infuses with the pickaxe to give it effect powers
    - Haste II
    - Speed II