Disable BWAMEM2 index when no short reads data

[reichan1998]

Fixes #65

• Add a function to check datatypes ( illumina or hic) from the samplesheet (params.input)

PR checklist

• This comment contains a description of changes (with reason).
• If you've fixed a bug or added code that should be tested, add tests!
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[tkchafin]

@reichan1998 sorry for the delay, I will get to this by the end of the week, just super busy at the moment!

[tkchafin]

Merging this into a separate branch for now as I realise that the implementation will change a bit after merging nf_validation