GitLab

I basically did the following:
`mkdir experiments/simbricks/orchestration`
`mv experiments/simbricks/* experiments/simbricks/orchestration/`

Additionally, imports and paths had to be adjusted.

fixes isort's wonky detection of first- and third-party for modules located in experiments/pyexps import modules from experiments/simbricks

Experiments can explicitly specify opt/fast (default is the latter).