feat: support alias translation

See #627

cli/app/upgrade.go

@@ -25,10 +25,14 @@ import (
 	"github.com/spf13/cobra"
 )
 
+// translators: `abra app upgrade` aliases. use a comma separated list of aliases with
+// no spaces in between
+var appUpgradeAliases = i18n.G("up")
+
 var AppUpgradeCommand = &cobra.Command{
 	// translators: `app upgrade` command
 	Use:     i18n.G("upgrade <domain> [version] [flags]"),
-	Aliases: []string{i18n.G("up")},
+	Aliases: strings.Split(appUpgradeAliases, ","),
 	// translators: Short description for `app upgrade` command
 	Short: i18n.G("Upgrade an app"),
 	Long: i18n.G(`Upgrade an app.