Merge branch 'main' into thg/modal-hooks

examples/advection/var-velocity.py

examples/dagrt-fusion.py

examples/geometry.py

examples/maxwell/cavities.py

examples/wave/var-propagation-speed.py

examples/wave/wave-min-mpi.py

examples/wave/wave-min.py

examples/wave/wave-op-mpi.py

examples/wave/wave-op-var-velocity.py

examples/wave/wave-op.py

test/mesh_data.py

test/test_grudge.py

test/test_mpi_communication.py