Changes

Summary

1. SPIGOT-6829: Add per-player world border API (details)

Commit 6c308e1b57e44bc97a0743b4e9703ed5469e09dd by md_5 (md_5) SPIGOT-6829: Add per-player world border API
	src/main/java/org/bukkit/craftbukkit/CraftServer.java
	nms-patches/net/minecraft/network/protocol/game/ClientboundSetBorderCenterPacket.patch
	nms-patches/net/minecraft/server/level/EntityPlayer.patch
	src/main/java/org/bukkit/craftbukkit/CraftWorldBorder.java
	src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java