add visualization_data

[jw3126]

No description provided.

[jw3126]

I added VisualizationData struct. I think we will need to dispatch on something like
AbstractPlotting.plot!(p::Plot(VisualizationData)) later.

[codecov-commenter]

Codecov Report

Merging #354 into master will decrease coverage by 6.09%.
The diff coverage is 89.74%.

@@            Coverage Diff             @@
##           master     #354      +/-   ##
==========================================
- Coverage   88.46%   82.37%   -6.10%     
==========================================
  Files         155      141      -14     
  Lines       10447     8481    -1966     
==========================================
- Hits         9242     6986    -2256     
- Misses       1205     1495     +290     

Impacted Files	Coverage Δ
src/Visualization/VisualizationData.jl	89.47% <89.47%> (ø)
src/Visualization/Vtk.jl	90.36% <100.00%> (-2.65%)	⬇️
src/Arrays/SubVectors.jl	20.00% <0.00%> (-60.00%)	⬇️
src/Geometry/TriangulationPortions.jl	41.66% <0.00%> (-41.67%)	⬇️
src/Helpers/Macros.jl	25.00% <0.00%> (-37.50%)	⬇️
src/Fields/AffineMaps.jl	64.70% <0.00%> (-35.30%)	⬇️
src/ReferenceFEs/MockDofs.jl	66.66% <0.00%> (-33.34%)	⬇️
src/Fields/ConstantFields.jl	66.66% <0.00%> (-29.77%)	⬇️
src/FESpaces/SingleFieldFEFunctions.jl	63.63% <0.00%> (-27.28%)	⬇️
src/Geometry/GenericBoundaryTriangulations.jl	72.51% <0.00%> (-24.19%)	⬇️
... and 130 more

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[jw3126]

@fverdugo can you merge this and add me to GridapMakie? I have some code I would like to put there.

[fverdugo]

Hi @jw3126,

I would like to discuss what we want to put in GridapMakie before granting access. We can discuss it tomorrow e.g. via Gitter