chore: add AGENTS.md for opencode agents

AGENTS.md

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+# Agents
+
+This role configures [Pangolin](https://digpangolin.com/) - a Docker management UI for homelabs.
+
+## Role Analysis
+
+- **Type**: Application server role (Docker management UI)
+- **OS Support**: Debian 12
+- **Deployment Method**: Docker
+- **Dependencies**: Docker must be installed
+
+## Tasks
+
+1. **create network** - Creates Docker network
+2. **install pangolin** - Deploys Pangolin via Docker
+3. **cleanup docker** - Cleans up Docker resources
+
+## Testing
+
+```bash
+ansible-lint
+molecule test
+```