docs: add comprehensive Podman deployment documentation

- Create PODMAN-DEPLOYMENT.md with complete Podman deployment guide
- Add PODMAN-QUICKSTART.md for quick deployment instructions
- Create deploy-podman.sh script for automated deployment
- Add podman-compose.yml for multi-service deployment
- Include troubleshooting, security, and monitoring guidance
- Provide migration guide from Docker to Podman

Author: monch1962