拆分数据处理分类，新增编码加密、数学计算分类

plugin/lib/quickcomposer/math/index.js

@@ -0,0 +1,5 @@
+const random = require("./random");
+
+module.exports = {
+  random,
+};

plugin/lib/quickcomposer/math/random.js

@@ -0,0 +1,23 @@
+const randomInt = (start, end) => {
+  return Math.round(Math.random() * (end - start) + start);
+};
+
+const random = (isInt = false, start, end) => {
+  if (!start && !end) {
+    return isInt ? randomInt(0, 1000000) : Math.random();
+  }
+
+  if (!end) {
+    end = Math.abs(randomInt(0, 1000000) - start);
+  }
+
+  if (!start) {
+    start = 0;
+  }
+
+  // 有start和end：返回区间随机数
+  const random = Math.random() * (end - start) + start;
+  return isInt ? Math.round(random) : random;
+};
+
+module.exports = random;