Feat(shared): GenericError decorator

[david1alvarez]

Because

• In instances where the client can call methods "directly" (such as via NextJS Server Actions), we need to ensure that the only data that gets passed through to the user is what is intended. Error propagation is a common way for unexpected data to leak to the user.

This pull request

• Adds a GenericError decorator to libs/shared/error that wraps a class, and captures any errors thrown by its methods. Unless specified, errors are replaced with a generic error message. Original error data is sent to Sentry, along with a data tag to indicate whether it was sanitized or passed through.

Issue that this pull request solves

Closes: FXA-10626

Checklist

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