Add support for parallel reads/writes.

[zoj613]

This commit parallelizes independent reads/writes of array chunks.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.72%. Comparing base (baea9e4) to head (61fcb9b).
⚠️ Report is 68 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #54      +/-   ##
==========================================
+ Coverage   97.62%   97.72%   +0.10%     
==========================================
  Files          15       15              
  Lines        1177     1189      +12     
==========================================
+ Hits         1149     1162      +13     
+ Misses         28       27       -1     

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