With id derive

Derive macros for with-id crate. See docs for with-id.

Implementation details

• When deriving implementation for WithRefId, for String field macro will generate &str return type, so type of derived implementation will be WithRefId<str>, not WithRefId<String>
• Macro does not check if type implements ToString (in case of WithStringId) and Clone in case of WithId, and will fail if it doesn't