Merge branch 'develop' into 89-mehrere-fenster-abhangigkeiten-von-core-zu-fenster-swapchain-etc

# Conflicts:
#	projects/first_mesh/src/main.cpp
#	projects/first_scene/src/main.cpp
#	projects/first_triangle/src/main.cpp
#	projects/mesh_shader/src/main.cpp
#	projects/particle_simulation/src/main.cpp
#	projects/voxelization/src/main.cpp