* Add first-class serialization for built-in Error subclasses
Replace the generic Error reducer/reviver with specific handlers for
TypeError, RangeError, SyntaxError, URIError, ReferenceError, EvalError,
and AggregateError. Preserve the cause property on all Error types,
only serializing it when present to maintain absence vs presence
semantics.
* Refactor Error subclass reducers/revivers with helper functions
Extract repetitive reducer/reviver logic into makeErrorSubclassReducer
and makeErrorSubclassReviver helpers. Reduces ~120 lines of duplicated
code to ~50 while preserving identical behavior. AggregateError remains
as a wrapping extension since it needs to preserve the errors array.
* Bump error-subclass-serialization changeset to minor
Adding new serialization support for built-in Error subclasses is a
feature, not a bug fix.
Nathan Rajlich