Feature Request: send callback errors as structured data

[fabriziosestito]

Is your feature request related to a problem?

When we get an error from a host callback, we forward the error to the guest as a string. This makes it more challenging to create custom error types within the SDKs, which could be useful, for example, for identifying different types of errors.

Solution you'd like

Send errors as serialized JSON and change the SDKs adding custom error types.

Alternatives you've considered

No response

Anything else?

No response