ArchR module

[JuliaPhilipp]

PR checklist

Was supposed to close #4375

• This comment contains a description of changes (with reason).
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This is a draft to add a module for ArchR.
The tools is quite extensive and will likely require submodules. I started on "createarrowfiles" and "adddoubletscores" during the hackathon.
"createarrowfiles" is in the testing stage but still has issues. Most significantly:
The example data (output from testing cellrangeratac) is not sufficient for testing archR (because of biology), I recommend proceeding with the test data that comes with the archR package

The most helpful part of this draft is the Dockerfile, since ArchR is not available on bioconda or bioconductor. (I ran the tests with a local docker image, not quay.io image or similar)

"adddoublescores" is mostly an outline of a submodule at this point