Make GPUs actually usable

[efaulhaber]

Depends on trixi-framework/PointNeighbors.jl#90 and trixi-framework/TrixiBase.jl#35.

This PR contains the following changes:

• TLSPH (and therefore FSI examples) now works on GPUs.
• TLSPH now works with Float32 (and therefore on Apple GPUs that don't support double precision).
• Plotting now works on the GPU.
• I added a new macro trixi_include_changeprecision(Float32, example_file) to conveniently change all Float64 literals in an example file to Float32, which is enough to make the whole simulation run with single precision (that's how we designed the code). Moved to Add macro trixi_include_changeprecision to make a double precision elixir run with single precision TrixiBase.jl#35.

Find the rendered docs for this PR here:
https://trixi-framework.github.io/TrixiParticles.jl/previews/PR689/

[codecov]

Codecov Report

Attention: Patch coverage is 42.85714% with 16 lines in your changes missing coverage. Please review.

Project coverage is 70.43%. Comparing base (6d04215) to head (c7abe36).

Files with missing lines	Patch %	Lines
src/visualization/recipes_plots.jl	0.00%	13 Missing ⚠️
...chemes/boundary/dummy_particles/dummy_particles.jl	60.00%	2 Missing ⚠️
...chemes/solid/total_lagrangian_sph/penalty_force.jl	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #689      +/-   ##
==========================================
- Coverage   70.53%   70.43%   -0.10%     
==========================================
  Files          96       96              
  Lines        5976     5974       -2     
==========================================
- Hits         4215     4208       -7     
- Misses       1761     1766       +5     

Flag	Coverage Δ
unit	70.43% <42.85%> (-0.10%)	⬇️

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[svchb]

A few selected examples should be executed for GPU compatibility so that more of the features are checked.

[efaulhaber]

A few selected examples should be executed for GPU compatibility so that more of the features are checked.

We would need a self-hosted runner with a GPU to test any of this.