docs: announce maintenance period

Author: im10furry

README.md

@@ -675,3 +675,7 @@ Apache 2.0 License - see [LICENSE](LICENSE) for details.
 - 📚 [Documentation](docs/)
 - 🐛 [Report Issues](https://github.com/shareAI-lab/kode/issues)
 - 💬 [Discussions](https://github.com/shareAI-lab/kode/discussions)
+
+## Maintenance Notice
+
+From July through December 2026, Kode will undergo a major maintenance and refactoring phase. The existing issue backlog has been archived so the project can reset around the upcoming architecture work. Please follow future releases and announcements for the refreshed roadmap. Stay tuned for the next phase.

README.zh-CN.md

@@ -583,3 +583,7 @@ Apache 2.0 许可证 - 详见 [LICENSE](LICENSE)。
 - 📚 [文档](docs/)
 - 🐛 [报告问题](https://github.com/shareAI-lab/kode/issues)
 - 💬 [讨论](https://github.com/shareAI-lab/kode/discussions)
+
+## 维护公告
+
+Kode 将在 2026 年 7 月至 12 月进入大规模维护与重构阶段。现有 issue 已统一归档关闭，以便项目重新梳理问题队列并集中推进后续架构工作。请关注后续版本与公告，敬请期待。