Implement PydanticSQSQueue

[anatoly-scherbakov]

Serialization and deserialization are troublemakers for me right now since I do not yet see a way to implement them in Rust-ish serde-like way. Something like this maybe:

m = SomePydanticModel(...)
serialized_string = m >> Base64Json
# or
Base64Json(serialized_string) >> SomePydanticModel

However, Base64Json is probably just a NewType, which means type erasure, but... whatever.

My point is that, for now, simple ad-hoc mixins like these would be very useful:

• PydanticSQSInputQueue
• DataclassSQSInputQueue
  etc.