Add a Sealos deployment option to the quickstart

[yangchuansheng]

Is your feature request related to a problem? Please describe.

The quickstart currently documents the local Docker Compose path. A tested Sealos template exists for users who run Coze Studio on Sealos, and the project documentation currently has no link to that deployment path.

Describe the solution you'd like

Add a short, docs-only Sealos deployment entry after the Docker quickstart in both README.md and README.zh_CN.md. The entry would include the standard Deploy on Sealos button and keep the existing public-network security warning visible next to the deployment instructions.

Proposed target: https://sealos.io/products/app-store/coze-studio

Describe alternatives you've considered

A provider-specific guide would carry more detail. A short bilingual README entry keeps the contribution small and points users to the maintained template documentation for configuration and troubleshooting.

Additional context

• Template version: Coze Studio 0.5.1
• Tested deployment: 2026-08-05
• The template provisions the web and server workloads together with MySQL, Redis, NSQ, etcd, Elasticsearch, Milvus, and private object storage.
• Secrets are generated or entered during deployment and are not stored in the upstream repository.
• Browser smoke covered registration and representative navigation.
• Runtime log scans ended with zero active failures, and all verification resources were cleaned up.
• I can maintain the Sealos deployment path and follow up when the template or docs need updates.