Split resort task

See merge request !896

Clarified cosmology dependence in morris av. Closes #568

Closes #568

See merge request !897

PU: update theory

See merge request !898

Fixed incorrect cosmology factors for pressure and internal energy in the i/o

See merge request !895

Gear merge pressure floor and GEAR star formation

See merge request !885

Removed large stack-overflowing VLAs from the code.

See merge request !882

Add the new global variable and some missing ones to the list of things written to and read from check-point files.

Adds v_sig calculation to force loop in ANARCHY-DU

See merge request !892

When doing a dry run that generates particles from the ICs, do not verify the (non-existing) particle links after creation of the gas particles.

Update i/o API in all examples (within reason)

See merge request !893

Backported the new interface to the chemistry from the COLIBRE fork.

See merge request !891