Add example using Meshes.jl

[JoshuaLampert]

• Add an example, which uses NodeSets generated by Meshes.jl and add test for it. For this we need Meshes.jl v0.52.1.
• Improve Meshes.jl extension, such that no internals are used.
• Add small section about visualization with Makie via Meshes.jl to docs.

[JoshuaLampert]

I also bumped the Meshes.jl in Project.toml instead of only in test/Project.toml for two reasons: 1. Downgrade fails otherwise, 2. I think every example should be runnable with just adding KernelInterpolation.jl, which means KernelInterpolation.jl should enforce a compatible Meshes.jl version also for all examples.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.63%. Comparing base (6b0e46c) to head (b6d9281).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #98   +/-   ##
=======================================
  Coverage   98.63%   98.63%           
=======================================
  Files          43       44    +1     
  Lines        1171     1174    +3     
=======================================
+ Hits         1155     1158    +3     
  Misses         16       16           

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