In-situ visualization #0: Make GLMakie available in 2D TreeMesh VisualizationCallback

[benegee]

This is the first step in reintegrating @s6nistam's work on in-situ visualization.

As an alternative to Plots.jl it adds plotting with GLMakie for 2D TreeMesh setups.

[github-actions]

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Created with ❤️ by the Trixi.jl community.

[codecov]

Codecov Report

Attention: Patch coverage is 12.90323% with 27 lines in your changes missing coverage. Please review.

Project coverage is 96.35%. Comparing base (679e4c7) to head (24fbffe).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
ext/TrixiGLMakieExt.jl	0.00%	22 Missing ⚠️
..._dgsem/elixir_advection_amr_visualization_makie.jl	0.00%	4 Missing ⚠️
src/callbacks_step/visualization.jl	80.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2225       +/-   ##
===========================================
+ Coverage   70.19%   96.35%   +26.17%     
===========================================
  Files         486      488        +2     
  Lines       39102    39190       +88     
===========================================
+ Hits        27445    37761    +10316     
+ Misses      11657     1429    -10228     

Flag	Coverage Δ
unittests	96.35% <12.90%> (+26.17%)	⬆️

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