Initial script to convert hapmap to zarr

[jeromekelleher]

A first pass at #851.

Opening the zarr and getting the recombination map now takes a fraction of a second, massively faster than parsing hapmap.

[codecov]

Codecov Report

Merging #852 (9cbad54) into main (7ee1b33) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #852   +/-   ##
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  Coverage   99.08%   99.08%           
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  Files          55       55           
  Lines        2412     2412           
  Branches      285      285           
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  Hits         2390     2390           
  Misses         14       14           
  Partials        8        8           

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[andrewkern]

would we still store hapmap formatted files in AWS or would we push a new directory full of zarrs?

[jeromekelleher]

Just push a new directory full of zarrs. We'd keep the old maps around forever, so that existing code won't break, but this would be a clean start.