add cmd/rpc

cmd/rpc/open_im_msg/main.go

@@ -0,0 +1,14 @@
+package main
+
+import (
+	rpcChat "Open_IM/internal/rpc/chat"
+	"Open_IM/src/utils"
+	"flag"
+)
+
+func main() {
+	rpcPort := flag.String("port", "", "rpc listening port")
+	flag.Parse()
+	rpcServer := rpcChat.NewRpcChatServer(utils.StringToInt(*rpcPort))
+	rpcServer.Run()
+}