[Bug fix][Enhance] Songlist parser & Bunder version error message

- For Arcaea 5.5.8 (no test)
- New character "Ai-chan"
- Add a small tool to send error message
- A `songlist` parser problem #156
- Fix that header checker of bundle version gives incorrect error messages.

latest version/database/init/singles.json

@@ -1702,5 +1702,23 @@
 		],
 		"orig_price": 100,
 		"price": 100
+	},
+	{
+		"name": "ultradiaxon",
+		"items": [
+			{
+				"type": "single",
+				"id": "ultradiaxon",
+				"is_available": true
+			},
+			{
+				"type": "core",
+				"amount": 1,
+				"id": "core_generic",
+				"is_available": true
+			}
+		],
+		"orig_price": 100,
+		"price": 100
 	}
 ]