feat: add support for IntervalNonlinearProblem

[AayushSabharwal]

Close #2672

Checklist

• Appropriate tests were added
• Any code changes were done in a way that does not break public API
• All documentation related to code changes were updated
• The new code follows the
  contributor guidelines, in particular the SciML Style Guide and
  COLPRAC.
• Any new documentation only uses public API

Additional context

Add any other context about the problem here.

[Sush1090]

Hello,
Can the IntervalNonlinearProblem be accessed inside the acausal framework? I am not sure if there is a way to specify a particular variable to be solved in an interval.

[ChrisRackauckas]

If your NonlinearSystem happens to have one equation then you can use this constructor.