Update go cli (#13717)

### What problem does this PR solve?

Go cli

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

cmd/ragflow_cli.go

@@ -10,8 +10,21 @@ import (
 )
 
 func main() {
-	// Create CLI instance
-	cliApp, err := cli.NewCLI()
+	// Parse command line arguments (skip program name)
+	args, err := cli.ParseConnectionArgs(os.Args[1:])
+	if err != nil {
+		fmt.Printf("Error: %v\n", err)
+		os.Exit(1)
+	}
+
+	// Show help and exit
+	if args.ShowHelp {
+		cli.PrintUsage()
+		os.Exit(0)
+	}
+
+	// Create CLI instance with parsed arguments
+	cliApp, err := cli.NewCLIWithArgs(args)
 	if err != nil {
 		fmt.Printf("Failed to create CLI: %v\n", err)
 		os.Exit(1)
@@ -26,9 +39,18 @@ func main() {
 		os.Exit(0)
 	}()
 
-	// Run CLI
-	if err := cliApp.Run(); err != nil {
-		fmt.Printf("CLI error: %v\n", err)
-		os.Exit(1)
+	// Check if we have a single command to execute
+	if args.Command != "" {
+		// Single command mode
+		if err = cliApp.RunSingleCommand(args.Command); err != nil {
+			fmt.Printf("Error: %v\n", err)
+			os.Exit(1)
+		}
+	} else {
+		// Interactive mode
+		if err = cliApp.Run(); err != nil {
+			fmt.Printf("CLI error: %v\n", err)
+			os.Exit(1)
+		}
 	}
 }