Puzzle 0.3.0 - 1.17

Modulized into:
puzzle-base (update checker + config)
puzzle-gui (unified config gui)
puzzle-models (remove limitations)
puzzle-blocks (custom render layers)
puzzle-splashscreen (resourcepack-provided spash screen)

Updated to 1.17

puzzle-gui/src/main/java/net/puzzlemc/gui/util/ColorUtil.java

@@ -0,0 +1,17 @@
+package net.puzzlemc.gui.util;
+
+import java.awt.*;
+
+public class ColorUtil {
+    /**
+     * @credit https://stackoverflow.com/questions/4129666/how-to-convert-hex-to-rgb-using-java
+     * @param colorStr e.g. "FFFFFF"
+     * @return
+     */
+    public static Color hex2Rgb(String colorStr) {
+        return new Color(
+                Integer.valueOf( colorStr.substring( 0, 2 ), 16 ),
+                Integer.valueOf( colorStr.substring( 2, 4 ), 16 ),
+                Integer.valueOf( colorStr.substring( 4, 6 ), 16 ));
+    }
+}