chore: 为多个package.json添加test:unit脚本并更新全局测试命令

在多个库和插件的package.json中添加统一的test:unit脚本
同时在根package.json中添加全局test:unit命令以并行运行所有子项目的单元测试

packages/libs/midway-flyway-js/package.json

@@ -13,6 +13,7 @@
     "dev-build": "npm run build",
     "test": "midway-bin test --ts -V",
     "test1": "midway-bin test --ts -V -f test/blank.test.ts -t 'hash-check'",
+    "test:unit": "echo no unit tests",
     "cov": "midway-bin cov --ts",
     "prepublish": "npm run build",
     "pub": "npm publish"