Remove hyphens from pipeline names in Nextflow workflows

[adamrtalbot]

Description of feature

There's a common convention outside of nf-core to call your pipeline nf-${thing}, but in doing this we add a hyphen which is an invalid Nextflow workflow name.

It's an easy fix shortly after creation to remove the hyphen, but we can replace all hyphens with strings while creating the subworkflow names.

[adamrtalbot]

We could also reduce the number of workflows so this only affects one workflow in total, but this is a bigger issue.

I.e. the hierarchy would be from:

1. anonymous workflow (main.nf)
2. NF_CORE_PIPELINE_NAME (main.nf)
3. PIPELINE_NAME (workflows/main.nf)

To:

1. anonymous workflow (main.nf)
2. PIPELINE_NAME (workflows/main.nf)

Cut out the middle man workflow.