fix: add NoArgs on root command and use cmd.Println in version

[pageton]

Summary

Two small correctness issues:

1. Root command accepts arbitrary arguments silently

main.go:13-16:

rootCmd := &cobra.Command{
    Use:   "gorm",
    Short: "GORM CLI Tool",
}

Running gorm foo bar silently does nothing instead of reporting an error. Add:

Args: cobra.NoArgs,

Or cobra.MaximumNArgs(0) if that reads better.

2. version command uses fmt.Printf instead of cmd.Printf

main.go:31-39:

Run: func(cmd *cobra.Command, args []string) {
    fmt.Printf("gorm-cli version %s\n", ...)
}

Using cmd.Println or cmd.Printf allows tests to capture output via cmd.OutOrStdout(). Also, the command uses Run instead of RunE — inconsistent with the gen command.

RunE: func(cmd *cobra.Command, args []string) error {
    // ...
    cmd.Printf("gorm-cli version %s\n", version)
    return nil
},