new module: VarScan

[vmelichar]

Is there an existing module for this?

• [x] I have searched for the existing module

Is there an open PR for this?

• [x] I have searched for existing PRs

Is there an open issue for this?

• [x] I have searched for existing issues

Further Information

VarScan is a variant caller (https://github.com/dkoboldt/varscan) that can do somatic, germline and CNV calling. Recently, there was a published benchmarking study (https://doi.org/10.1093/bib/bbae697), that proposes best combinations of variant callers to use. Following up on the study, I want to implement this into nf-core/sarek, for that I need to include this new variant caller.

Are you going to work on this?

• [x] If I'm planning to work on this module, I added myself to the Assignees to facilitate tracking who is working on the module