Using an AbortSignal and Promise.race we abandon running migrations that take longer to complete after the process is aborted than the given abortRespite period
* feat(types): move Emigrate types to separate package
Also refactor the types to use discriminating unions for easier error handling and such.
Errors passed to storage plugins should now be serialized and storage plugins are expected to return already serialized errors on failed history entries.
* fix(mysql): handle the new type changes
* fix(storage-fs): handle the new type changes
* feat(cli): better error handling and types
Adapt to the new types from the @emigrate/types package, like discriminating union types and serializing and deserializing errors
