chore: add AGENTS.md for opencode agents

# Agents

This role configures [SemaphoreUI](https://semaphoreui.com/) - an open-source Ansible UI and alternative to AWX/Tower.

## Role Analysis

- **Type**: Application server role (automation UI)

- **OS Support**: Debian 12

- **Deployment Method**: Docker

- **Dependencies**: Docker must be installed

## Tasks

1. **install semaphore** - Deploys SemaphoreUI via Docker

2. **cleanup docker** - Cleans up Docker resources

## Testing

```bash

ansible-lint

molecule test

```