Commands: Add convert with two sub-commands (#3661)

* Add back convert-configs-to-protobuf command.

* Add convert-typedMessage-to-json command.

* Add -debug and -type arguments into convert.pb sub-command.

---------

Co-authored-by: nobody <nobody@nowhere.mars>

main/commands/all/convert/convert.go

@@ -0,0 +1,17 @@
+package convert
+
+import (
+	"github.com/xtls/xray-core/main/commands/base"
+)
+
+// CmdConvert do config convertion
+var CmdConvert = &base.Command{
+	UsageLine: "{{.Exec}} convert",
+	Short:     "Convert configs",
+	Long: `{{.Exec}} {{.LongName}} provides tools to convert config.
+`,
+	Commands: []*base.Command{
+		cmdProtobuf,
+		cmdJson,
+	},
+}