Integration service - Define grpc protobuf service with http api

[jkralik]

Feature Request:

Integration of gRPC Protobuf with HTTP Annotations for Generating gRPC Server and HTTP Handlers

API:

• Create rule
• Update rule
• Delete rules
• Load rules

Acceptance Criteria:

• Implementation of gRPC server with HTTP handlers.
• Documentation generated for Swagger.yaml.
• The service provides both gRPC and HTTP, but methods currently return unimplemented.
• Conduct simple integration tests for the HTTP and gRPC APIs.