[Enhance] BYD boost & BYD chain maps

- Add support for beyond gauge boost
- Add support for beyond chain maps
- Add support skills of uncapped ilith and mika
- Unlock four chars and uncapped ilith
- Some changes in some values' algorithms

latest version/database/init/packs.json

@@ -646,5 +646,23 @@
 		"price": 700,
 		"discount_from": 1646784000000,
 		"discount_to": 1647388799000
+	},
+	{
+		"name": "maimai_append_1",
+		"items": [
+			{
+				"type": "pack",
+				"id": "maimai_append_1",
+				"is_available": true
+			},
+			{
+				"type": "core",
+				"amount": 4,
+				"id": "core_generic",
+				"is_available": true
+			}
+		],
+		"orig_price": 400,
+		"price": 400
 	}
 ]