stdlib: 新增 kvlang/reflect，networld 下沉 edit/shell/python（Part of #170） - #344

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/