Expose types such as RuleExpression for further use

[simonwep]

Is your feature request related to a problem? Please describe.

It's currently not possible to import types such as RuleExpression or FieldOptions as they're not exposed.

Describe the solution you'd like

Types such as RuleExpression to be exposed for further use :)

Describe alternatives you've considered

Extracting the type via typeof and Parameters from useField:

export type Rules = Parameters<typeof useField>[1];

[logaretm]

I believe the FieldOptions are exposed already. I will expose RuleExpression in the next release.