Check if all parameters in output_fields are correct

examples/main.c

examples/output_fields_example.yml

src/chemistry/none/chemistry_io.h

src/common_io.c

src/common_io.h

src/gravity/Default/gravity_io.h

src/hydro/Gadget2/hydro_io.h

src/stars/Default/star_io.h

src/swift.h