add Spotless plugin: enforce code formatting

src/main/java/eu/mhsl/minecraft/pixelpics/utils/ImageMapRenderer.java

@@ -1,13 +1,12 @@
 package eu.mhsl.minecraft.pixelpics.utils;
 
+import java.awt.image.BufferedImage;
 import org.bukkit.entity.Player;
 import org.bukkit.map.MapCanvas;
 import org.bukkit.map.MapRenderer;
 import org.bukkit.map.MapView;
 import org.jetbrains.annotations.NotNull;
 
-import java.awt.image.BufferedImage;
-
 /**
  * Draws precomputed map palette indices onto the canvas. Supports a Polaroid-style "developing"
  * animation: the picture dissolves in over {@link #DEVELOP_MILLIS} once the render is ready, like an
@@ -24,9 +23,9 @@ public class ImageMapRenderer extends MapRenderer {
     private static byte filmIndex = 0;
     private static boolean filmResolved = false;
 
-    private volatile byte[] indices;          // MAP_SIZE*MAP_SIZE, null while still rendering
+    private volatile byte[] indices; // MAP_SIZE*MAP_SIZE, null while still rendering
     private final boolean animate;
-    private volatile long developStart = 0;   // 0 until indices are available
+    private volatile long developStart = 0; // 0 until indices are available
     private boolean finished = false;
     private boolean blankDrawn = false;
 
@@ -88,8 +87,7 @@ public class ImageMapRenderer extends MapRenderer {
         byte film = film();
         for (int y = 0; y < MAP_SIZE; y++) {
             for (int x = 0; x < MAP_SIZE; x++) {
-                byte value = (progress >= 1.0 || revealThreshold(x, y) <= progress)
-                    ? data[y * MAP_SIZE + x] : film;
+                byte value = (progress >= 1.0 || revealThreshold(x, y) <= progress) ? data[y * MAP_SIZE + x] : film;
                 canvas.setPixel(x, y, value);
             }
         }

src/main/java/eu/mhsl/minecraft/pixelpics/utils/MapColorPalette.java

@@ -1,11 +1,10 @@
 package eu.mhsl.minecraft.pixelpics.utils;
 
 import eu.mhsl.minecraft.pixelpics.render.util.ColorUtil;
-import org.bukkit.map.MapPalette;
-
 import java.awt.Color;
 import java.util.ArrayList;
 import java.util.List;
+import org.bukkit.map.MapPalette;
 
 /**
  * The set of usable Minecraft map colors, with nearest-color matching in CIELAB (perceptual) space.
@@ -92,7 +91,7 @@ public final class MapColorPalette {
         double fx = pivotXyz(x / 0.95047);
         double fy = pivotXyz(y);
         double fz = pivotXyz(z / 1.08883);
-        return new double[]{116 * fy - 16, 500 * (fx - fy), 200 * (fy - fz)};
+        return new double[] {116 * fy - 16, 500 * (fx - fy), 200 * (fy - fz)};
     }
 
     private static double pivotXyz(double t) {

src/main/java/eu/mhsl/minecraft/pixelpics/utils/MapManager.java

@@ -1,16 +1,6 @@
 package eu.mhsl.minecraft.pixelpics.utils;
 
 import eu.mhsl.minecraft.pixelpics.Main;
-import org.bukkit.Bukkit;
-import org.bukkit.Material;
-import org.bukkit.World;
-import org.bukkit.entity.ItemFrame;
-import org.bukkit.entity.Player;
-import org.bukkit.inventory.ItemStack;
-import org.bukkit.inventory.meta.MapMeta;
-import org.bukkit.map.MapView;
-
-import javax.imageio.ImageIO;
 import java.awt.image.BufferedImage;
 import java.io.File;
 import java.io.IOException;
@@ -19,6 +9,15 @@ import java.util.HashSet;
 import java.util.Set;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+import javax.imageio.ImageIO;
+import org.bukkit.Bukkit;
+import org.bukkit.Material;
+import org.bukkit.World;
+import org.bukkit.entity.ItemFrame;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.MapMeta;
+import org.bukkit.map.MapView;
 
 /**
  * Persists rendered images (PNG, source of truth) and their dithered map-color indices (cache) to