Adds VTKCells converter

[Matthew-Whisenant]

This PR follows up on the accidentally closed PR #28

This PR sets up the workflow between ReadVTK -> WriteVTK by adding to_meshcell. Here the changes are:

• New function to_meshcell that converts VTKCells type to multiple WriteVTK compliant MeshCells
• Test in the first basic testing to check for to_meshcell correctness
• Added example of workflow in main index page. Let me know if you want something changed.
• Added my name to contributors. My university page got cleared in a address move but will be back up in a week or so. This new address will be the permanent one so no need for a recommit.
• Added .vscode to gitignore to help vscode users settings not mess with commits. Helps me not added whitespace to commits.

Note that I separated PRs in this to make more sense on an orthogonal feature level. My next PR will include more inclusive testing of ReadVTK -> WriteVTK workflow with ParaView and standard files. But this single test should at least cover testing of the conversion in and of itself.

This PR must be accepted before the larger ParaView one, but I figured it was worth it for clarity to split them up.

[Matthew-Whisenant]

I guess range was different for LTS Julia 1.6 so I updated so that it works. Strange that it worked on Julia 1 but failed on Julia 1.6. They must have reverted back because it didn't fail on 1.85. Regardless, I fixed so it works an all version. The fix was kinda weird and not really clear with the colon operator in-place of range but avoids a for loop.

[Matthew-Whisenant]

Does anyone have any suggestions on how to see what is causing the format check to fail? Or what the specifications are?

[sloede]

Does anyone have any suggestions on how to see what is causing the format check to fail? Or what the specifications are?

Sorry about that. This is a change that came into effect only this morning (Europe time). The easiest fix is to run JuliaFormatter on your branch as described in the README.md.

[Matthew-Whisenant]

Does anyone have any suggestions on how to see what is causing the format check to fail? Or what the specifications are?

Sorry about that. This is a change that came into effect only this morning (Europe time). The easiest fix is to run JuliaFormatter on your branch as described in the README.md.

Yes I see that now. However it does not appear that the default settings works. Looking at the 'format-check' test, it appears to be flagging files I have not changed.

Formatting /home/runner/work/ReadVTK.jl/ReadVTK.jl/docs/make.jl
Formatting /home/runner/work/ReadVTK.jl/ReadVTK.jl/src/ReadVTK.jl
Formatting /home/runner/work/ReadVTK.jl/ReadVTK.jl/src/get_functions.jl
Formatting /home/runner/work/ReadVTK.jl/ReadVTK.jl/test/pvtk_files.jl
Formatting /home/runner/work/ReadVTK.jl/ReadVTK.jl/test/rectilinear.jl
Formatting /home/runner/work/ReadVTK.jl/ReadVTK.jl/test/runtests.jl
Formatting /home/runner/work/ReadVTK.jl/ReadVTK.jl/test/structuredgrid.jl

Is their a way to share your settings so that it always does yours?

EDIT: Actually I think re-merging with main fixed it. I see there is a settings it needs.