fix(utils): Unwrap loadable/selectAtom promise types

[Pinpickle]

#713 changed the type signature for atoms. The data field for a loadable ended up incorrectly typed with a promise, when it should be unwrapped.

A similar issue occurred with selectAtom

This adds a ResolveType (used in other files) to fix it.

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[dai-shi]

ohhhhh, nice catch. thanks a lot!
something totally missed in #713. thanks for the test too.

[dai-shi]

Maybe type assertion can be solved (eliminated) with the future version (with Awaited?)

[Pinpickle]

Maybe type assertion can be solved (eliminated) with the future version (with Awaited?)

I sure hope so! Although I don't know if it'll eliminate the assertion altogether... the code may need some refactoring so that TS knows the promise has been resolved.