feat: base grpc system and base use

cmd/agent/main.go

@@ -1 +1,32 @@
 package main
+
+import (
+	"context"
+	"log"
+	"time"
+
+	"github.com/lorsanstand/HomeOps-Hub/api/gen/homeops"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+	"google.golang.org/protobuf/types/known/emptypb"
+)
+
+func main() {
+	conn, err := grpc.Dial("127.0.0.1:6756", grpc.WithTransportCredentials(insecure.NewCredentials()))
+	if err != nil {
+		log.Fatalf("dial: %v", err)
+	}
+	defer conn.Close()
+
+	client := homeops.NewHubClient(conn)
+
+	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
+	resp, err := client.Ping(ctx, &emptypb.Empty{})
+	if err != nil {
+		log.Fatalf("dial: %v", err)
+	}
+
+	defer cancel()
+
+	log.Printf("pong: %+v", resp.Pong)
+}