feat(deploy): add Sealos template for Refly application deployment

[webup]

Summary

• Resolves One-click deployment to SealOS #777 (needs further adaptation once the dynamic model selection feature is activated)
• Introduced a new Kubernetes configuration file for deploying the Refly application using Sealos.
• Included specifications for the application, database, Elasticsearch, MinIO, Qdrant, and Redis services.
• Configured environment variables and persistent volume claims for data storage.
• Ensured proper service wiring and health checks for all components.

Impact Areas

Please check the areas this PR affects:

• Multi-threaded Dialogues
• AI-Powered Capabilities (Web Search, Knowledge Base Search, Question Recommendations)
• Context Memory & References
• Knowledge Base Integration & RAG
• Quotes & Citations
• AI Document Editing & WYSIWYG
• Free-form Canvas Interface
• Other

Screenshots of Deployment Workflow

1. Kickstart your new app with an all-in-one index.yaml using Sealos.
   

2. Grab the kubeconfig file from your workspace and check the deployment status with k9s.
   

3. Use port forwarding to connect the refly-web service to localhost:8080.
   

4. Explore the web service and sign up as a new user.
   

5. Log in to dive into the exciting world of the refly canvas!
   

Checklist

Important

Please review the checklist below before submitting your pull request.

• This change requires a documentation update, included: Refly Documentation
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

[pftom]

This PR #827 has already implement deploy to Sealos feature.