to discuss: get rid of pybids dependency

[lzehl]

reasons:

• pybids comes with a lot of additional dependencies we don't need
• pybids does not extract all the things we need anyway

suggestion:

• have a look at the bybids code and see if we can extract the parts we need directly here
• maybe have a look if we can make use of the yaml that define the bids specs

[lzehl]

alternative packages we could have a look at instead of pybids: ancpBIDS Docu: https://ancpbids.readthedocs.io/en/latest/ Github: https://github.com/ANCPLabOldenburg/ancp-bids MRdataset Docu: https://open-minds-lab.github.io/MRdataset/ GitHub: https://github.com/Open-Minds-Lab/MRdataset