add token_set next token info

src/main/java/net/pietru/cookie_utils/scripting/tokens/TokenSet.java

@@ -18,6 +18,11 @@ public class TokenSet implements BaseToken {
         return token.equals("set") && tokens.length>=step+3;
     }
 
+    /**
+     * token_name
+     * key
+     * value (x)
+     * */
     @Override
     public int next_token(String[] tokens, int step) {
         return 2+BaseScript.get_string(tokens, step+2).size();