Normalize Exception Types

[Blacksmoke16]

Context

Resolves #128

NOTE: From this point on, if a component wants to rescue any exception it MUST use ::Exception to avoid conflicting with the new Exception component namespace.

Once Crystal 1.13 is officially released, we can bump min required version and remove the manual exception type checks.

Changelog

• Breaking: Rename namespace exceptions live in to Exception from Exceptions
• Breaking: Parent type of some exception types have changed
  • May result in it not being rescued if the rescue was on the parent type and not the exception type itself
• Breaking: Rename RuntimeError console exception type to Runtime
• Breaking: Remove ACON::Exceptions::ConsoleException
• Breaking: Remove ACON::Exceptions::ValidationFailed
• Breaking: Remove Athena::Negotiation::Exceptions::Negotiation
• Breaking: Remove Athena::Serializer::Exceptions::SerializerException
• Breaking: Remove Athena::Validator::Exceptions::ValidatorError
• Bump minimum Crystal version to 1.13 for console, mercure, negotiation, and serializer components