Add network calibration functionality

[ptiede]

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 47.41784% with 112 lines in your changes missing coverage. Please review.

Project coverage is 87.38%. Comparing base (99890ed) to head (1f93894). Report is 70 commits behind head on main.

Files with missing lines	Patch %	Lines
src/rules.jl	0.00%	47 Missing :warning:
src/network_cal.jl	0.00%	30 Missing :warning:
src/instrument/model.jl	74.28%	9 Missing :warning:
src/instrument/priors/array_priors.jl	36.36%	7 Missing :warning:
src/instrument/site_array.jl	37.50%	5 Missing :warning:
src/posterior/vlbiposterior.jl	16.66%	5 Missing :warning:
src/instrument/priors/refant.jl	0.00%	3 Missing :warning:
src/instrument/priors/segmentation.jl	60.00%	2 Missing :warning:
src/mrf_image.jl	92.00%	2 Missing :warning:
src/instrument/jonesmatrices.jl	95.23%	1 Missing :warning:
... and 1 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #362      +/-   ##
==========================================
- Coverage   92.50%   87.38%   -5.12%     
==========================================
  Files          30       31       +1     
  Lines        1574     1617      +43     
==========================================
- Hits         1456     1413      -43     
- Misses        118      204      +86     

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