Add method for verifying JWT token

[Pante]

From my understanding, we currently need to verify JWT tokens passed from the client to the server manually using a 3rd party library. There is already a function to retrieve the jwks URL, https://workos.com/docs/reference/user-management/session-tokens/jwks. It would be great if the SDk provided a convenience method to verify & decode the JWT token similar to how Firebase does so.