feat: implement issue and accept oob proofs

apps/gateway/src/app/managers/proof.controller.ts

apps/proof-manager/src/app/app.controller.ts

gateway-swagger.json

libs/askar/src/agent.utils.ts

libs/askar/src/askar-nats/event.handler.service.ts

libs/askar/src/askar-rest/rest.controller.ts

libs/askar/src/askar/agent-event-listener.service.ts

libs/askar/src/askar/agent.service.ts

libs/askar/src/askar/askar.module.ts

libs/askar/src/askar/askar.service.ts

...r/src/askar/transports/agent.subject.inbound.transport.ts

.../src/askar/transports/agent.subject.outbound.transport.ts

libs/dtos/src/dtos/requests/accept.proof.request.dto.ts

libs/dtos/src/events/dtoToEventTransformer.ts