Merge branch 'feature/cgns' into 'master'

.gitlab-ci/build-and-test.sh

CHANGELOG.md

CMakeLists.txt

cmake/ThirdPartyCCM.cmake

cmake/ThirdPartyCGNS.cmake

cmake/thirdparty-patches/cgns-hdf5-prefer-parallel.patch

docker/nektar-env/bookworm_documentation_packages.txt

docs/developer-guide/developer-guide.tex

docs/developer-guide/utilities/assets/CollapsedCoords.tex

docs/developer-guide/utilities/assets/HOhex.tex

docs/developer-guide/utilities/assets/HOprism.tex

docs/developer-guide/utilities/assets/HOpyra.tex

docs/developer-guide/utilities/assets/HOquad-arrow.tex

docs/developer-guide/utilities/assets/HOquad-numbered.tex

docs/developer-guide/utilities/assets/HOtet.tex

docs/developer-guide/utilities/assets/HOtri-arrow.tex

docs/developer-guide/utilities/assets/HOtri-numbered.tex

docs/developer-guide/utilities/assets/Hex-ok.tex

docs/developer-guide/utilities/assets/NekMeshHierarchy.tex

docs/developer-guide/utilities/assets/PrismRule-bad.tex