Add libbox wrapper

experimental/libbox/config.go

@@ -0,0 +1,15 @@
+package libbox
+
+import (
+	"github.com/sagernet/sing-box/option"
+	E "github.com/sagernet/sing/common/exceptions"
+)
+
+func parseConfig(configContent string) (option.Options, error) {
+	var options option.Options
+	err := options.UnmarshalJSON([]byte(configContent))
+	if err != nil {
+		return option.Options{}, E.Cause(err, "decode config")
+	}
+	return options, nil
+}