gRPC service generation

This tutorial shows how to generate a basic gRPC service like a seat service. For this example the proto file under https://raw.githubusercontent.com/eclipse-kuksa/kuksa-incubation/0.4.0/seat_service/proto/sdv/edge/comfort/seats/v1/seats.proto is taken.

All files included from services/seats are auto-generated and added to the app project as Conan dependency. For writing a complete gRPC service you need two velocitas apps/projects. One is implementing a client and the other one is for providing the server. To complete the server implementation you have to fill the generated *ServiceImpl.cpp. Have a look at the linked content beneath for a tutorial how it would be done for a SeatService leveraging https://raw.githubusercontent.com/eclipse-kuksa/kuksa-incubation/0.4.0/seat_service/proto/sdv/edge/comfort/seats/v1/seats.proto .

To run the example you need to start the velocitas app for the server first and then the second velocitas app for the client.