chore: add lib, mod and crate foundation for event validation

[samika98]

WIP : AES-27 Create the bones: structs/traits/hooks to validate events

Description

Validating an event signature is the easy part and we have more work to actually validate an event. Add the hooks so we can check the ceramic properties of an event.

This includes

validate init event signature against controller

adding data events to a queue that keeps it in memory and loads the init event (when available for recon)

validating the signature against the init event controller

validating the cacao resources

adding time events to a (possibly separate) queue that can retrieve block information and validate the root and proof