refactor payment platform canonicalization and order method consistency

internal/logic/public/order/paymentMethod.go

@@ -0,0 +1,11 @@
+package order
+
+import paymentPlatform "github.com/perfect-panel/server/pkg/payment"
+
+func canonicalOrderMethod(method string) string {
+	platform := paymentPlatform.ParsePlatform(method)
+	if platform == paymentPlatform.UNSUPPORTED {
+		return method
+	}
+	return platform.String()
+}