feat(netcdf): support writing simulation

[mjreno]

NetCDF simulation write support:

• netcdf argument supported for write_simulation()
• NetCDF simulation load not yet supported
• argument can create structured, layered or no NetCDF file
• model and package support for interactively creating dataset

Non-interactive example:

# load ascii simulation 
sim = flopy.mf6.MFSimulation.load(sim_ws=ascii_ws)
# set simulation path and write simulation
sim.set_sim_path(netcdf_ws)
sim.write_simulation(netcdf="structured")

MODFLOW 6 netcdf file info via MFModel / MFPackage. Static and instance methods support retrieving attribute dictionaries for LAYERED MESH (UGRID) or non-mesh netcdf files. The attributes in the returned dictionary are those required for a MODFLOW 6 compliant netcdf model input file. Usage examples for structured datasets are in the tutorial files.

[codecov]

Codecov Report

❌ Patch coverage is 14.06926% with 397 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.3%. Comparing base (556c088) to head (f72a49c).
⚠️ Report is 34 commits behind head on develop.

Files with missing lines	Patch %	Lines
flopy/mf6/mfpackage.py	10.9%	138 Missing ⚠️
flopy/discretization/structuredgrid.py	2.4%	120 Missing ⚠️
flopy/discretization/vertexgrid.py	1.4%	66 Missing ⚠️
flopy/mf6/mfmodel.py	21.3%	59 Missing ⚠️
flopy/mf6/data/mfdataarray.py	57.8%	8 Missing ⚠️
flopy/mf6/data/mfstructure.py	81.8%	2 Missing ⚠️
flopy/discretization/grid.py	50.0%	1 Missing ⚠️
flopy/discretization/unstructuredgrid.py	50.0%	1 Missing ⚠️
flopy/mf6/data/mfdatastorage.py	80.0%	1 Missing ⚠️
flopy/mf6/utils/codegen/filters.py	0.0%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2564      +/-   ##
===========================================
+ Coverage     55.5%    72.3%   +16.7%     
===========================================
  Files          644      667      +23     
  Lines       124135   129503    +5368     
===========================================
+ Hits         68947    93685   +24738     
+ Misses       55188    35818   -19370     

Files with missing lines	Coverage Δ
flopy/mf6/mfbase.py	75.0% <100.0%> (-12.7%)	⬇️
flopy/mf6/mfsimbase.py	62.2% <100.0%> (-13.3%)	⬇️
flopy/discretization/grid.py	75.6% <50.0%> (-0.4%)	⬇️
flopy/discretization/unstructuredgrid.py	75.0% <50.0%> (-6.5%)	⬇️
flopy/mf6/data/mfdatastorage.py	70.5% <80.0%> (-3.4%)	⬇️
flopy/mf6/utils/codegen/filters.py	0.0% <0.0%> (ø)
flopy/mf6/data/mfstructure.py	73.8% <81.8%> (+<0.1%)	⬆️
flopy/mf6/data/mfdataarray.py	58.5% <57.8%> (-8.5%)	⬇️
flopy/mf6/mfmodel.py	53.9% <21.3%> (-27.0%)	⬇️
flopy/discretization/vertexgrid.py	64.5% <1.4%> (-19.2%)	⬇️
... and 2 more

... and 402 files with indirect coverage changes

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