Create an initial gRPC service

This commit adds protobuf files and tooling surrounding generating APIs
and datatypes.

tools.go

@@ -0,0 +1,12 @@
+//go:build tools
+// +build tools
+
+package tools
+
+import (
+	_ "github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-grpc-gateway"
+	_ "github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2"
+	_ "github.com/infobloxopen/protoc-gen-gorm"
+	_ "google.golang.org/grpc/cmd/protoc-gen-go-grpc"
+	_ "google.golang.org/protobuf/cmd/protoc-gen-go"
+)