Converter script for .hic to hseq

[cvaske]

This script converts the well-established .hic file format into the HoloSeq hseq format using the
straw library. The hic format
stores a symmetric matrix, and the converter only provides the lower
triangle of counts to distinguish it from asymmetric matrices.

The hseq data format is described here:
https://github.com/holoviz-topics/holoSeq/blob/main/docs/HoloSeqOverview.md

Usage:

1. Install the required dependency:

   pip install hic-straw
   

2. Download a .hic file. For example, in the series
   GSE207951,
   click on "(custom)" in the table at the bottom, check a single .hic
   file, then click the "Download" button. Untar it.

3. Run the conversion script:

   python3 scripts/hic2hseq.py input.hic output.hseq.gz
   

4. Use the output file in the HoloSeq environment to display the matrix:

   panel serve scripts/holoseq_display.py --show --args --inFile output.hseq.gz --size 1000
   

Example Data:

A pre-converted HTAN file for GSM6326543 is
available (530MB).

See hseq conversion output of GSM6326543 at holoseq/docs/assets/README_GSM6326543.png

[droumis]

@cvaske throwing the review back to you after refactoring and reorganizing into the scripts dir.. please run the conversion now to confirm and then merge if you're happy with this

[droumis]

@cvaske, could you also please add a one sentence motivation/context at the top of the PR description for those less aware of this domain

[cvaske]

The script worked great, however I moved the dependency on hic-straw to the pyprojec.toml since we now have a proper package. Requesting review to make sure that's the best place for the dependency.

[droumis]

LGTM!