Add error type to Promise actors

[svemat01]

Adds the ability to define an error type for Promise actors, offering more precise type details for error states.

A practical use case for this is my neverthrow actor wrapper, which enables creating a promise actor from a ResultAsync function with a known error type. This allows proper handling of results with onDone and onError, avoiding the need to match against the result in onDone, which works but is more cumbersome and less clear in the inspector.

[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: e264dacdf5167c995871f8afd488aab1b6d84383

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[svemat01]

I'm not entirely sure if this qualifies as a minor or patch semver change, so feel free to respond with the best option or make the update yourself, whichever works best.