RANS_mesh refactoring, surface mesh generation improvment

[GBenedett]

Refactoring of surface mesh generation

[codecov]

Codecov Report

Attention: Patch coverage is 15.96639% with 100 lines in your changes missing coverage. Please review.

Project coverage is 62.52%. Comparing base (1b7ff5c) to head (98876f2).
Report is 1133 commits behind head on main.

Files with missing lines	Patch %	Lines
ceasiompy/CPACS2GMSH/func/RANS_mesh_generator.py	2.08%	94 Missing ⚠️
ceasiompy/PyAVL/func/avlresults.py	33.33%	4 Missing ⚠️
ceasiompy/CPACS2GMSH/cpacs2gmsh.py	75.00%	1 Missing ⚠️
ceasiompy/SU2Run/func/su2config_rans.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #302      +/-   ##
==========================================
- Coverage   62.75%   62.52%   -0.24%     
==========================================
  Files          96       96              
  Lines        9602     9657      +55     
==========================================
+ Hits         6026     6038      +12     
- Misses       3576     3619      +43     

Flag	Coverage Δ
integrationtests	45.32% <13.79%> (-0.17%)	⬇️
unittests	51.27% <60.86%> (+0.02%)	⬆️

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[LeonDeligny]

Already done in branch : new_RANS_mesh by Cassyr. This PR is not up to date anymore.