添加新设置项，拆分css

nonebot_plugin_acgnshow/util.py

@@ -1,16 +1,17 @@
 import os
 import random
 import datetime
-
-from .config import BGIMAGE_PATH
+from pathlib import Path
+from .config import config
 
 
 def choose_random_bgimage() -> str:
     """
     从背景图片文件夹中随机选择一张图片，返回图片的uri地址
     """
-    randomfile = random.choice(os.listdir(BGIMAGE_PATH))
-    randomurl = (BGIMAGE_PATH / randomfile).as_uri()
+    bgpath = Path(config.acgnshow_bgimage_path)
+    randomfile = random.choice(os.listdir(bgpath))
+    randomurl = (bgpath / randomfile).as_uri()
     return randomurl