docs(bee-dev): update dev command with deprecation warning and doc link (#5283)

Author: akrem-chabchoub

cmd/bee/cmd/start_dev.go

@@ -14,13 +14,15 @@ import (
 	"github.com/ethersphere/bee/v2/pkg/node"
 	"github.com/kardianos/service"
 	"github.com/spf13/cobra"
+	"golang.org/x/term"
 )
 
 func (c *command) initStartDevCmd() (err error) {
 
 	cmd := &cobra.Command{
 		Use:               "dev",
-		Short:             "Start a Swarm node in development mode",
+		Short:             "Start in dev mode. WARNING: This command will be deprecated soon.",
+		Long:              "WARNING: This command will be deprecated soon. For more information, please refer to the official documentation: https://docs.ethswarm.org/docs/develop/tools-and-features/bee-dev-mode and check back regularly for updates.",
 		PersistentPreRunE: c.CheckUnknownParams,
 		RunE: func(cmd *cobra.Command, args []string) (err error) {
 			if len(args) > 0 {
@@ -54,6 +56,26 @@ func (c *command) initStartDevCmd() (err error) {
 
 			fmt.Println(beeASCII)
 			fmt.Println()
+
+			warningBox := `
+╔══════════════════════════════════════════════════════════════════════════════╗
+║                                                                              ║
+║  WARNING: This command will be deprecated soon.                              ║
+║                                                                              ║
+║  For more information, please refer to the official documentation:           ║
+║  https://docs.ethswarm.org/docs/develop/tools-and-features/bee-dev-mode      ║
+║                                                                              ║
+║  Please check back regularly for updates.                                    ║
+║                                                                              ║
+╚══════════════════════════════════════════════════════════════════════════════╝
+`
+			if term.IsTerminal(int(os.Stdout.Fd())) {
+				fmt.Print("\u001b[33m" + warningBox + "\u001b[0m")
+			} else {
+				fmt.Print(warningBox)
+			}
+			fmt.Println()
+
 			fmt.Println("Starting in development mode")
 			fmt.Println()