[Evals] Headless evals with Docker

[canrobins13]

Description

Allows for headless execution of evals in a Docker container.
Note that headless evals can only run without concurrency for now; attempting to run with concurrency introduces errors.
Future work will include integrating headless evals with a cloud runner and sharding across jobs

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Important

Adds Docker support for headless evals, updates CLI for Docker-specific conditions, and includes Docker scripts in package.json.

• Docker Support:
  • Adds Dockerfile for setting up a headless eval environment with necessary dependencies.
  • Introduces .dockerignore to exclude unnecessary files from Docker build.
• CLI Changes:
  • Updates runExercise in index.ts to handle Docker environment, including concurrency checks and command adjustments.
  • Adds error handling for concurrency greater than 1 in Docker.
• Scripts:
  • Updates package.json with Docker-related scripts: docker:build, docker:run, docker:start, docker:shell, docker:stop, docker:rm, and docker:clean.

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