chore: add AGENTS.md for opencode agents

# Agents

This role configures KEA DHCP server - a modern, scalable DHCP implementation.

## Role Analysis

- **Type**: Infrastructure service role

- **OS Support**: Alpine 3.22, Debian 12

- **Deployment Method**: Direct (not Docker-based)

- **Scope**: DHCP server installation and configuration

## Tasks

1. **install** - Installs KEA DHCP

2. **config** - Configures DHCP settings

## Testing

```bash

ansible-lint

molecule test

```