feat: add camel template

[phala-agent]

Summary

• Add a Phala Cloud prebuilt template for camel-ai/camel.
• Upstream repository: https://github.com/camel-ai/camel
• Template files: templates/prebuilt/camel/docker-compose.yml, templates/prebuilt/camel/README.md, templates/config.json
• Icon: camel.png; source documented in the README.

Environment variables

• See the template README for optional provider/runtime environment variables. No real secrets are included.

Validation

• python sdks/templates/validate.py
• git -C sdks diff --check origin/main...HEAD
• docker compose -f sdks/templates/prebuilt/camel/docker-compose.yml config >/dev/null
• static audit: README coverage, config ID uniqueness, icon file, forbidden compose directives, host bind mounts, and secret-like literals

Deployment smoke

• Deployed with phala deploy --profile hermes-admin-cvm-check --instance-type tdx.small --node-id 12 --wait --no-public-logs --no-public-sysinfo
• Smoke CVM: b7759432-d264-44eb-b82b-63e976e9617e
• Smoke app: 5da75180ec49f8662ddf72b142084a63579d5ab8
• Endpoint probe: https://5da75180ec49f8662ddf72b142084a63579d5ab8-8080.dstack-pha-prod7.phala.network/healthz -> 200 779 0.086777 rc=0
• Cleanup: temporary smoke CVM deletion requested and verified separately.

cc @Marvin-Cypher for review.

[phala-agent]

cc @Marvin-Cypher for review.