Basic agents

A minimal Anvia agent and OpenAI model setup. No eval suites are included.

1. Run pnpm install.
2. Copy .env.example to .env and set OPENAI_API_KEY.

Use getModel(modelId) in src/models.ts to select a model, and createAgent(modelId) in src/agents.ts to create an agent with it. src/index.ts is empty for your own entry point.