Add version subcommand to report gorm-cli build version (#33)

* feat: add version command to CLI

* use runtime/debug build info for version

* level added

* Inline version resolution into `versionCmd`; remove top-level `getVersion`

Author: miladev95

main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"fmt"
 	"os"
+	"runtime/debug"
 
 	"github.com/spf13/cobra"
 	"gorm.io/cli/gorm/internal/gen"
@@ -15,9 +16,27 @@ func main() {
 	}
 
 	rootCmd.AddCommand(gen.New())
+	rootCmd.AddCommand(versionCmd())
 
 	if err := rootCmd.Execute(); err != nil {
 		fmt.Println(err)
 		os.Exit(1)
 	}
 }
+
+func versionCmd() *cobra.Command {
+	return &cobra.Command{
+		Use:   "version",
+		Short: "Print the version of gorm-cli",
+		Run: func(cmd *cobra.Command, args []string) {
+			if info, ok := debug.ReadBuildInfo(); ok {
+				if info.Main.Version != "" && info.Main.Version != "(devel)" {
+					fmt.Printf("gorm-cli version %s\n", info.Main.Version)
+					return
+				}
+			}
+
+			fmt.Printf("gorm-cli version %s\n", "dev")
+		},
+	}
+}