Feature request: Output generated RSA keys as JSON Web Key

**Is your feature request related to a problem? Please describe.**
the current output format "JSON" of the RSA key generation is no really useful and must always be transformed first

**Describe the solution you'd like**
Output the keys as JSON Web Key, so they can be used directly by other applications

**Describe alternatives you've considered**
transforming the PEM format to JWK

Locate the RSA key-generation operation and inspect how its current JSON and PEM outputs are produced. Determine the JWK output shape needed for generated keys; the work is done when the operation can emit keys directly as usable JSON Web Keys.

Written by the indexing model from the issue text.