Skill Point Items

Adds in 12 new items for [LevelZ](https://modrinth.com/mod/levelz), 1 for each stat, that level up your skills.  These items have a 1/8th chance to be found in any vanilla minecraft structure. This datapack requires [Loot Table Modifier](https://modrinth.com/mod/loot-table-modifier) for the items to be found.