[enums] Add partial support for enum types

[GhostWalker562]

Description

Add some support for skipping types when parsing structs. This sets up support for enums with the limited information given.

If the struct is unknown and options.allowUnknownStructs is true, we will just let the struct be FixedBytes
If the struct is known through moduleAbi and is fieldless, we will consider it an enum and the struct will be FixedBytes
If the struct is a framework know enum (like DelegationKey or RateLimiter), the struct will be FixedBytes

Test Plan

• Tested locally to ensure that Enum function arguments were passed and parsed properly.

Related Links

N/A

Checklist

• Have you ran pnpm fmt?
• Have you updated the CHANGELOG.md?

[gregnazario]

Seems fine, but keep in mind, you could have structs that are not defined in the current module, since you are using it for any public function.

This will probably need to be reworked to be able to make outbound calls if the struct type doesn't match the module

[GhostWalker562]

@gregnazario yeah I ran into that edge case 😞. I think we should find a way to walk through all of the types and structs and make the appropriate calls but definitely for another PR