ADD: Ravens support to ONM

[juanjospina]

Work-in-progress (WIP)

1. Adds support to solving ONM problems using RAVENS json file.
2. Adds functions to convert from MATH to ENG model to create solutions in the currently supported RONM format.

NOTE: It requires the branch add-ravens-schema from PowerModelsDistribution (this branch is what gives support for parsing ravens2math)

[codecov]

Codecov Report

Attention: Patch coverage is 3.38164% with 200 lines in your changes missing coverage. Please review.

Project coverage is 78.27%. Comparing base (e910054) to head (dab0ab1).
Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
src/data_model/ravens2math.jl	0.00%	142 Missing ⚠️
src/prob/dispatch.jl	0.00%	52 Missing ⚠️
src/core/base.jl	50.00%	2 Missing ⚠️
src/core/ref.jl	71.42%	2 Missing ⚠️
src/prob/common.jl	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #19      +/-   ##
==========================================
- Coverage   81.64%   78.27%   -3.37%     
==========================================
  Files          45       46       +1     
  Lines        5328     5487     +159     
==========================================
- Hits         4350     4295      -55     
- Misses        978     1192     +214     

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