refactor(src/clover_image): 使用 aiohttp 替代 requests 实现异步图片下载

- 将 requests 库替换为 aiohttp库，以支持异步请求- 重构 download_image 函数，使其支持异步下载
-优化图片下载逻辑，使用 while循环异步读取数据块
- 更新异常捕获类型，从 requests.RequestException 改为 aiohttp.ClientError

(cherry picked from commit c4b1019232)

src/clover_image/download_image.py

@@ -1,4 +1,4 @@
-import requests
+import aiohttp
 
 async def download_image(url,file_path):
     """
@@ -8,10 +8,14 @@ async def download_image(url,file_path):
     :return:
     """
     try:
-        response = requests.get(url, stream=True)
-        response.raise_for_status()
-        with open(file_path, 'wb') as file:
-            for chunk in response.iter_content(chunk_size=8192):
-                file.write(chunk)
-    except requests.RequestException as e:
+        async with aiohttp.ClientSession() as session:
+            async with session.get(url) as response:
+                response.raise_for_status()
+                with open(file_path, 'wb') as file:
+                    while True:
+                        chunk = await response.content.read(8192)
+                        if not chunk:
+                            break
+                        file.write(chunk)
+    except aiohttp.ClientError as e:
         print(f"下载图片时出错: {e}")