Export additional useful types

[trevorsmith]

I'd like access to more internal ts-pattern types to:

• Create wrapper functions around match (e.g. from a class method)
• Type generics passed into match / when / etc.
• Explicitly type matches inside other types, like interfaces
• etc.

I've included exports all of the potential user-facing types I could find – did I miss any?

[svemat01]

What's the reason for including the dist folder in the repo?