Support specifying different algorithms for signing and encrypting

[dangodb]

Is your feature request related to a problem? Please describe.
The Create API currently use the same algorithm specified in the query to create the signing and encryption keys.

Describe the solution you'd like
Allow the API caller to specify different algorithms to use for signature vs encryption. Alternatively since only ECDSA, EdDSA and RSA are supported, create the signing key with the algorithm specified and use RSA for the encryption key as the 2 other are DSA algorithms.