[codex] Publish CodeTogether AI Helm chart

[CodeTogetherBot]

Summary

• Publish CodeTogether AI as a new public Helm chart under charts/ai/.
• Set chart name to codetogether-ai with chart version 0.1.0 and app version 0.1.1204.
• Use the customer image defaults from hub.edge: hub.edge.codetogether.com/releases/codetogether-ai:latest.
• Add customer-facing install docs, configuration template, and helper scripts for properties secrets and the protected storage master key.

Customer install

helm repo add codetogether https://helm.codetogether.io
helm repo update
helm install codetogether-ai codetogether/codetogether-ai \
  --namespace codetogether-ai --create-namespace \
  --set-file ctaiPropertiesFile=./ctai-configuration.properties \
  --set imageCredentials.username=... \
  --set imageCredentials.password=...

Post-merge

• The chart-releaser workflow publishes this chart to https://helm.codetogether.io as codetogether/codetogether-ai after merge to main.
• Internal overlays remain only in CodeTogether-Inc/ct-ai; SPEC.md, values-aitrax.yaml, values-cluster.yaml, and values-local.yaml are not included in this public chart.

Validation

• helm lint .
• helm template test-release . --set-file ctaiPropertiesFile=./ctai-configuration.properties.template --set service.fqdn=https://example.codetogether.io --set imageCredentials.username=test --set imageCredentials.password=test
• helm package . --destination /tmp plus package exclusion check for spec|values-aitrax|values-cluster|values-local