v3 - main to cut out

cmd/rpc/open_im_group/main.go

@@ -0,0 +1,15 @@
+package main
+
+import (
+	"Open_IM/internal/rpc/group"
+	"flag"
+	"fmt"
+)
+
+func main() {
+	rpcPort := flag.Int("port", 10500, "get RpcGroupPort from cmd,default 16000 as port")
+	flag.Parse()
+	fmt.Println("start group rpc server, port: ", *rpcPort)
+	rpcServer := group.NewGroupServer(*rpcPort)
+	rpcServer.Run()
+}