fix(list-message): use SINGLE_SELECT instead of PRODUCT_LIST in generateListMessageLegacy

PRODUCT_LIST type requires WhatsApp Business catalog data and causes
error 479 for regular menu lists. SINGLE_SELECT is the correct type
for interactive menu lists with sections/rows.

https://claude.ai/code/session_01SJdSHiUxtwzV8bb5dedodb

src/Utils/messages.ts

@@ -1020,7 +1020,7 @@ export const generateListMessageLegacy = (
 			description,
 			buttonText,
 			footerText: footer,
-			listType: WAProto.Message.ListMessage.ListType.PRODUCT_LIST,
+			listType: WAProto.Message.ListMessage.ListType.SINGLE_SELECT,
 			sections: listInfo.sections.map(section => ({
 				title: section.title,
 				rows: section.rows.map(row => ({