Base envs

[Wytamma]

Many pipelines have a base env that the pipeline should run in.

Need a way to configure the base env so that the pipeline will start in that env.

snk install emilhaegglund/TADA --base-env environment.yaml

Then running tada will activate the base env before running.

Need to handle deactivate and clean up also.

[Wytamma]

I'm currently using venv for isolated environments could change to something like env-exec to add support for conda base envs.

[Wytamma]

Will close for now...