Simplified SkyWorldBlock

1.Added More SkyWorldBlock Advancements(With Special Rewards and Recipes):
Rewards:

[Diamond Armor Collector]:Advanced Diamond Sword and Tools(Unbreakable)

[Zombie Slayer]:Coal Guy's Sword(Have a chance to get random enchantments)

Recipes:

[Zombie Slayer]:Zombie Head Recipe

[Experienced]:Gunpowder Recipe

[Oh, a creeper... Head?]:Wandering Trader Spawn Egg Recipe

[Need Bones?]:Snowball Recipe

2.Removed testing nether portal in the Command Station to prevent any Zombie Pigman or any other mobs in that area which can cause problems

3.Solve some issues

4.New Rarity:Reward Item