Add hgvs parsing support for Range based SequenceLocations

[larrybabb]

The current hgvs_tools.py does not consider the handling of hgvs expressions that have start or end Range values. I believe the biocommons/hgvs module support this but we are currently presuming the start/end is always an int.

[korikuzma]

@larrybabb CNVs are for 50+ bp? What are the rules for Allele vs CNV?

[korikuzma]

@larrybabb CNVs are for 50+ bp? What are the rules for Allele vs CNV?

@larrybabb : Doesn't matter because user will choose the translator

[korikuzma]

@larrybabb what would you expect this allele to look like NC_000023.11:g.(31060227_31100351)_(33274278_33417151)dup?

[korikuzma]

@larrybabb :

Only want to support range for sequence locations used in copy number variation (CnvTranslator). Only support g. and m.

[korikuzma]

This was done in #387. Once the hgvs PR gets merged, we need to move these changes to main. I'll keep this issue open as a reminder