- Add pixi.toml with digger and pipeline environments
- Implement PixiRunner class replacing DockerContainerManager
- Add run_digger_stage.py for standalone digger execution
- Update run_single_fna_pipeline.py to use PixiRunner
- Remove docker dependency from pyproject.toml
- Delete docker_client.py (no longer needed)
BREAKING CHANGE: Docker is no longer required. Use 'pixi install' instead.