feat(permission): 添加权限判断是否有效

test/permission.test.ts

@@ -0,0 +1,8 @@
+import { test, expect } from "@jest/globals";
+import { Permission } from "../src/utils/permission";
+
+test("测试 Permission#isValid()", () => {
+  const permission = new Permission([]);
+  expect(permission.isValid("aaa:bbb:ccc")).toBe(true);
+  expect(permission.isValid("aaa:bbb:")).toBe(false);
+});