Refactor some biome stuff

src/main/java/com/dfsek/terra/biome/BiomeZone.java

@@ -40,7 +40,7 @@ public class BiomeZone {
      * @param z Z coordinate
      * @return BiomeGrid at coordinates.
      */
-    protected BiomeGrid getGrid(int x, int z) {
+    public BiomeGrid getGrid(int x, int z) {
         return grids[NormalizationUtil.normalize(useImage ? Objects.requireNonNull(imageLoader).getNoiseVal(x, z, channel) : noise.getNoise(x, z), grids.length, 4)];
     }
 

src/main/java/com/dfsek/terra/biome/grid/TerraBiomeGrid.java

@@ -1,5 +1,9 @@
-package com.dfsek.terra.biome;
+package com.dfsek.terra.biome.grid;
 
+import com.dfsek.terra.biome.BiomeZone;
+import com.dfsek.terra.biome.UserDefinedBiome;
+import com.dfsek.terra.biome.postprocessing.CoordinatePerturb;
+import com.dfsek.terra.biome.postprocessing.ErosionNoise;
 import com.dfsek.terra.config.base.ConfigPack;
 import com.dfsek.terra.config.base.ConfigUtil;
 import com.dfsek.terra.config.lang.LangUtil;

src/main/java/com/dfsek/terra/biome/grid/UserDefinedGrid.java

@@ -1,5 +1,6 @@
-package com.dfsek.terra.biome;
+package com.dfsek.terra.biome.grid;
 
+import com.dfsek.terra.biome.UserDefinedBiome;
 import com.dfsek.terra.config.base.WorldConfig;
 import com.dfsek.terra.image.ImageLoader;
 import org.bukkit.Location;

src/main/java/com/dfsek/terra/biome/postprocessing/CoordinatePerturb.java

@@ -1,4 +1,4 @@
-package com.dfsek.terra.biome;
+package com.dfsek.terra.biome.postprocessing;
 
 import com.dfsek.terra.procgen.math.Vector2;
 import org.polydev.gaea.math.FastNoiseLite;

src/main/java/com/dfsek/terra/biome/postprocessing/ErosionNoise.java

@@ -1,4 +1,4 @@
-package com.dfsek.terra.biome;
+package com.dfsek.terra.biome.postprocessing;
 
 import org.polydev.gaea.math.FastNoiseLite;
 
@@ -26,7 +26,7 @@ public class ErosionNoise {
      * @param z Z coordinate
      * @return Whether location is eroded
      */
-    boolean isEroded(int x, int z) {
+    public boolean isEroded(int x, int z) {
         double abs = Math.pow(noise.getNoise(x, z), 2);
         return abs < thresh;
     }