Manager API to manage SAML and OIDC clients

We need an API to be able to register SAML and OIDC clients.

Proposed methods:

• addsamlsp
• deleteSamlSp
• findSamlSpByConfKey
• findSamlSpByEntityId
• getSamlSpByConfKey
• replaceSamlSp
• updateSamlSp
• addoidcrp
• deleteOidcRp
• findOidcRpByClientId
• findOidcRpByConfKey
• getOidcRpByConfKey
• replaceOidcRp
• updateOidcRp