Build Nuget package for the .NET interface

[burkenyo]

Nuget packages are the standard way to share .NET libraries (called assemblies). This change allows us to release the preview .NET interface on Nuget

WIP

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Checklist

• [ ] The pull request includes a clear description of this code change
• [ ] Commit messages have short titles and reference relevant issues
• [ ] Build passes (scons build & scons test) and unit tests address code coverage
• [ ] Style & formatting of contributed code follows contributing guidelines
• [ ] The pull request is ready for review

[codecov[bot]]

Codecov Report

Merging #1596 (689266a) into main (cde1e79) will decrease coverage by 0.06%. The diff coverage is 45.83%.

@@            Coverage Diff             @@
##             main    #1596      +/-   ##
==========================================
- Coverage   70.61%   70.55%   -0.06%     
==========================================
  Files         379      380       +1     
  Lines       59153    59222      +69     
  Branches    21252    21252              
==========================================
+ Hits        41768    41785      +17     
- Misses      14311    14363      +52     
  Partials     3074     3074              

Files Changed	Coverage Δ
...terfaces/dotnet/Cantera/src/Interop/InteropUtil.cs	49.66% <27.77%> (-19.96%)	:arrow_down:
interfaces/dotnet/Cantera/src/Application.cs	92.68% <100.00%> (-1.20%)	:arrow_down:
...aces/dotnet/Cantera/src/DataDirectoryCollection.cs	91.30% <100.00%> (ø)
...nterfaces/dotnet/Cantera/src/Interop/LibCantera.cs	100.00% <100.00%> (ø)
interfaces/dotnet/Cantera/src/SpeciesCollection.cs	32.40% <100.00%> (ø)
interfaces/dotnet/Cantera/src/ThermoPhase.cs	34.14% <100.00%> (+1.64%)	:arrow_up:

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