Gravity tricks

# Description: allow players to dynamically shift their gravitational pull using a special block # Addition: ## Add 3 blocks: - Gravity block: change the gravity of a player in a 1 block radius - Powerful gravity block: Change the gravity of a player in a 3 block radius - Planet core block: Change gravity of a player like you were on a planet with configurable radius ## Additional information: - Your gravity is reset at 2000 block y to prevent soft-lock [](https://curseforge.com/minecraft/mc-mods/gravity-tricks "CurseForge")