Release v0.5

[ranocha]

Here is a list of breaking changes we would like to get into Trixi.jl v0.5

• Encode affine Cartesian meshes for quad and hex DGMulti solvers #961
• breaking changes for Trixi.jl v0.5 #1302
  • Switch from Val(true), Val(false) to True(), False from Static.jl #937
  • Rename split_form_kernel! to flux_differencing_kernel! to match VolumeIntegralFluxDifferencing. Strictly speaking, this is not breaking, since this name is not documented. However, we use it for some benchmark code so it's better to wait for a breaking release.
  • Remove deprecated features, e.g., marked by # TODO: DGMulti, v0.5 (search also for deprecate and depwarn)
• p4est bindings generated with Clang.jl #1184

Then, we also need to

• update the compat bounds of Trixi2Vtk.jl appropriately to build the docs of Trixi.jl

Postpone to a later release (moved to #1310):

• Discuss names of serial/parallel mesh types #1046
• wrap RHS to reduce latency with OrdinaryDiffEq.jl #1255
  • If we want this to work smoothly, we will have to break plot(sol)
• Unify signatures of mesh constructors #1194

[ranocha]

@trixi-framework/principal-developers Any other wishes for breaking changes? Since the P4est.jl updates are nearly ready for a new release, I would like to push this forward.