Derive IsPlutusData

[chfanghr]

• implement derive macro forIsPlutusData.
• Move PlutusData and IsPlutusData to a crate plutus-data. The reason was that there's not a unified way to reference types and functions in the macro otherwise.
• Fixed a few bugs in error messages of instances for "primitive" types; improved parsing logic.
• Replace as many manually written IsPlutusData instances in plutus-ledger-api with derivation as possible.
• All tests passed, including golden tests, to verify the correctness of the generated instances.

TODOs:

• Test the derive macro itself, mainly edge cases

[szg251]

Move PlutusData and IsPlutusData to a crate plutus-data. The reason was that there's not a unified way to reference types and functions in the macro otherwise.

Personally, I'd prefer to have a use crate as plutus_ledger_api; in every module in plutus-ledger-api where we're using the macro, instead of having a separate package.

[chfanghr]

@szg251 Done. I don't know how to implement the derive feature flag tho.