[Feature Request] Add Cloud codec server example

[lorensr]

Is your feature request related to a problem? Please describe.

https://github.com/temporalio/samples-typescript/tree/main/encryption

has a codec server, but it doesn't verify with JWKS and get email from decoded JWT.

Describe the solution you'd like

Since it's only for Cloud, maybe add a src/codec-server-cloud.ts?