Rules registration - rewrite and rearrange order of argument

[Zeutschler]

from: register_rule(self, function, trigger: list[str] = None, feeder: list[str] = None, scope: RuleScope = None, injection: RuleInjectionStrategy = None, code: str = None):

to: register_rule(self, function, trigger: str | list[str] = None, scope: RuleScope = None, feeder: str | list[str] = None, injection: RuleInjectionStrategy = None, code: str = None):