add isometric head renderer

src/main/java/cc.fascinated/common/ImageUtils.java

@@ -0,0 +1,25 @@
+package cc.fascinated.common;
+
+import jakarta.validation.constraints.NotNull;
+
+import java.awt.*;
+import java.awt.geom.AffineTransform;
+import java.awt.image.BufferedImage;
+
+public class ImageUtils {
+
+    /**
+     * Resize an image.
+     *
+     * @param src the source image
+     * @param scale the scale factor
+     * @return the scaled image
+     */
+    public static BufferedImage resize(@NotNull final BufferedImage src, final double scale) {
+        BufferedImage scaled = new BufferedImage((int) (src.getWidth() * scale), (int) (src.getHeight() * scale), BufferedImage.TYPE_INT_ARGB);
+        Graphics2D graphics = scaled.createGraphics();
+        graphics.drawImage(src, AffineTransform.getScaleInstance(scale, scale), null);
+        graphics.dispose();
+        return scaled;
+    }
+}