Add Voice Incident Commander Agent

Summary

Add a voice agent for incident command and on-call workflows, focused on status updates, escalation intent, and transcript-based summaries.

Proposed location

voice_agents/incident_commander_agent/

What to build

Create a runnable voice-enabled agent for SRE or on-call scenarios. A user should be able to ask for incident status, dictate updates, request next steps, and trigger escalation intent detection.

Use LiveKit Agents, Pipecat, or another voice-agent framework already compatible with the repository's style. The project should include transcript logging, incident state tracking, structured action summaries, and the repo's existing model-provider configuration pattern.

Acceptance criteria

• Includes a README.md based on .github/README_TEMPLATE.md.
• Supports voice input and agent responses for an incident workflow.
• Tracks incident state across turns.
• Detects escalation intent or uncertainty.
• Saves transcript logs and produces structured incident action summaries.
• Includes sample/mock incident data.
• Adds one catalog entry to the root README.md under Voice Agents.

Contribution notes

Please keep this to one self-contained project and one pull request. Link the pull request with Closes #<issue-number>.