chore: add AGENTS.md for opencode agents

# Agents

This role configures [Jellyfin](https://jellyfin.org/) media server - a free, open-source media streaming solution.

## Role Analysis

- **Type**: Application server role (media)

- **OS Support**: Debian 13

- **Deployment Method**: Docker

- **Dependencies**: Docker must be installed

## Tasks

1. **install jellyfin** - Deploys Jellyfin via Docker

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

## Testing

```bash

ansible-lint

molecule test

```