SIP-8 Webhooks for External Services

As the SSI-Service grows in complexity, we need to add webhooks for certain tasks related to credential processing in the back office. Webhooks can provide a flexible and efficient way for the SSI-Service to communicate with other systems or services.

Here is the proposal to adding webhooks to the ssi-service - https://github.com/TBD54566975/ssi-service/tree/main/sip/sips/sip8

This proposal involves creating new routes that add configuration to webhooks and allows other services to subscribe to events and get the data that the SSI-Service gets