[#1437] neofs-cli: Move util command to a separate package

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

cmd/neofs-cli/modules/util/convert.go

@@ -0,0 +1,14 @@
+package util
+
+import "github.com/spf13/cobra"
+
+var convertCmd = &cobra.Command{
+	Use:   "convert",
+	Short: "Convert representation of NeoFS structures",
+}
+
+func initConvertCmd() {
+	convertCmd.AddCommand(convertEACLCmd)
+
+	initConvertEACLCmd()
+}