Improvements to hictk validate

[robomics]

Closes #237.

[codecov]

Codecov Report

Attention: Patch coverage is 68.90756% with 111 lines in your changes missing coverage. Please review.

Project coverage is 74.58%. Comparing base (95d36fd) to head (0f0d476).
Report is 36 commits behind head on main.

Files with missing lines	Patch %	Lines
src/hictk/validate/validate.cpp	68.49%	67 Missing and 19 partials ⚠️
src/hictk/include/hictk/tools/common.hpp	64.58%	10 Missing and 7 partials ⚠️
...oler/include/hictk/cooler/impl/validation_impl.hpp	65.21%	5 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #238      +/-   ##
==========================================
- Coverage   75.50%   74.58%   -0.93%     
==========================================
  Files         140      144       +4     
  Lines       11652    12058     +406     
  Branches     1330     1384      +54     
==========================================
+ Hits         8798     8993     +195     
- Misses       1759     1947     +188     
- Partials     1095     1118      +23     

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