verification/rvgen: Add support for Hybrid Automata

verification/rvgen: Add support for Hybrid Automata

Add the possibility to parse dot files as hybrid automata and generate
the necessary code from rvgen.

Hybrid automata are very similar to deterministic ones and most
functionality is shared, the dot files include also constraints together
with event names (separated by ;) and state names (separated by \n).

The tool can now generate the appropriate code to validate constraints
at runtime according to the dot specification.

Reviewed-by: Nam Cao <namcao@linutronix.de>
Link: https://lore.kernel.org/r/20260330111010.153663-5-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>