Move some methods to RegionAccessor (#7635)

patches/server/Expose-vanilla-BiomeProvider-from-WorldInfo.patch

@@ -35,8 +35,8 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 --- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
 +++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
 @@ -0,0 +0,0 @@ public class CraftWorld extends CraftRegionAccessor implements World {
- 
-         return this.getHandle().clip(new ClipContext(vec3d, vec3d1, ClipContext.Block.COLLIDER, ClipContext.Fluid.NONE, null)).getType() == HitResult.Type.MISS;
+     public int getPlayerCount() {
+         return world.players().size();
      }
 +
 +    @Override