Add nextflow pipeline

[quentinblampey]

The snakemake pipeline should be translated to nextflow to reach more users. Don't hesitate to comment this issue to show your interest, else we keep it as a low priority

EDIT: I'm not very familiar to Nextflow, so I'm open to pull requests :)

[jeffquinn-msk]

We wrote a nextflow pipeline for running baysor on 10X Xenium in case its helpful: https://github.com/tansey-lab/nuc2seg/blob/main/nextflow/workflows/nf-core/baysor/main.nf

[quentinblampey]

Thanks @jeffquinn-msk, I'll have a look!