feat: support BigInteger packer

packer/src/main/java/com/reajason/javaweb/packer/BigIntegerPacker.java

@@ -0,0 +1,13 @@
+package com.reajason.javaweb.packer;
+
+import lombok.SneakyThrows;
+
+import java.math.BigInteger;
+
+public class BigIntegerPacker implements Packer {
+    @Override
+    @SneakyThrows
+    public String pack(ClassPackerConfig config) {
+        return new BigInteger(config.getClassBytes()).toString(36);
+    }
+}

packer/src/main/java/com/reajason/javaweb/packer/Packers.java

@@ -65,6 +65,11 @@ public enum Packers {
 
     Jar(new DefaultJarPacker()),
 
+    /**
+     * BigInteger
+     */
+    BigInteger(new BigIntegerPacker()),
+
     /**
      * BCEL
      */