Rule behavior option flags

[segfly]

Is your feature request related to a problem? Please describe.
In some cases, rule behavior may need to be customized to best express various use-cases. For example:

1. Either require all facts need to be present to fire or to treat absent facts as false
2. In regard to Fact retraction and cascading feature #59 (if implemented), enable/disable automatic retraction cascade

Describe the solution you'd like
Add a options parameter to rule creation:

engine.rule(
    when=~condition(lambda: Analysis.passed),
    then=action(AnalysisResultsPassed()),
    options=TreatAbsentFactsAsFalse | AutomaticRetraction
)

Where the options are an enum.

However, further design and consideration is required before implementing this solution.

Describe alternatives you've considered
None.

Additional context
None.