feat(main): add --version

Author: lvan100

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"os"
 
 	"github.com/go-spring/gs-gen/gen"
@@ -12,20 +13,27 @@ const Version = "v0.0.1"
 
 func main() {
 	var (
+		version  bool
 		server   bool
 		language string
 	)
 
 	root := &cobra.Command{
 		Use:          "gs-gen",
-		Short:        "gs-gen is a http code gen tool",
+		Short:        "A http code gen tool",
 		SilenceUsage: true,
 	}
 
+	root.Flags().BoolVar(&version, "version", false, "show version")
 	root.Flags().BoolVar(&server, "server", false, "gen server code or not")
 	root.Flags().StringVar(&language, "lang", "go", "language, go/php/java")
 
 	root.RunE = func(cmd *cobra.Command, args []string) error {
+		if version {
+			fmt.Println(root.Short)
+			fmt.Println(Version)
+			return nil
+		}
 		config := &generator.Config{
 			ProjectDir: ".",
 			Server:     server,