refactor: urfave v3

cli/server/server.go

@@ -1,15 +1,16 @@
 package server
 
 import (
-	"github.com/urfave/cli/v2"
+	"github.com/urfave/cli/v3"
 )
 
 // ServerCommand defines the `abra server` command and its subcommands
 var ServerCommand = cli.Command{
-	Name:    "server",
-	Aliases: []string{"s"},
-	Usage:   "Manage servers",
-	Subcommands: []*cli.Command{
+	Name:      "server",
+	Aliases:   []string{"s"},
+	Usage:     "Manage servers",
+	UsageText: "abra server [command] [arguments] [options]",
+	Commands: []*cli.Command{
 		&serverAddCommand,
 		&serverListCommand,
 		&serverRemoveCommand,