Would you guys support addition of a `SNES_DIVERGED_USER` to `SNESConvergedReason`? We already have `SNES_LINESEARCH_FAILED_USER`, so I think there is some precedent. The motivator is here: https://github.com/idaholab/moose/pull/16377. None of the current options fit the reason we want to error, and this is truly a user criterion for considering the nonlinear solve diverged.
Alex
