Implement hictk metadata command

[robomics]

Closes #161

[codecov]

Codecov Report

Attention: Patch coverage is 93.59431% with 18 lines in your changes missing coverage. Please review.

Project coverage is 85.35%. Comparing base (48341b4) to head (824b9e9).
Report is 24 commits behind head on main.

Files	Patch %	Lines
src/hictk/metadata/common.hpp	91.95%	7 Missing ⚠️
src/hictk/metadata/hic.hpp	91.30%	6 Missing ⚠️
src/hictk/cli/cli.cpp	80.00%	2 Missing ⚠️
src/hictk/metadata/cool.hpp	95.83%	1 Missing ⚠️
src/hictk/metadata/mcool.hpp	95.45%	1 Missing ⚠️
src/hictk/metadata/scool.hpp	96.77%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #204      +/-   ##
==========================================
+ Coverage   85.10%   85.35%   +0.25%     
==========================================
  Files         120      126       +6     
  Lines       10332    10579     +247     
==========================================
+ Hits         8793     9030     +237     
- Misses       1539     1549      +10     

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