feat: 添加多个功能模块和工具脚本

- 新增websocket客户端和服务端实现
- 添加图片压缩工具和快速压缩脚本
- 实现学生信息处理相关API
- 添加MQTT客户端和消息处理功能
- 更新.gitignore忽略更多文件类型
- 添加数据库操作工具和示例
- 实现多个测试脚本和工具类

websocket/receiver.py

@@ -0,0 +1,40 @@
+import asyncio
+import websockets
+import argparse
+import time
+
+async def receive_messages(stream_id):
+    uri = f"ws://192.168.0.209:9999/ws/live/barrage/{stream_id}?access_token=59c74e75-32d5-4d15-ab99-fde861004502&TENANT-ID=1"
+    
+    while True:
+        try:
+            print(f"Connecting to {uri}...")
+            async with websockets.connect(uri) as websocket:
+                print(f"Listening on stream: {stream_id}")
+                while True:
+                    try:
+                        message = await websocket.recv()
+                        print(f"Received: {message}")
+                    except websockets.exceptions.ConnectionClosed:
+                        print("Connection closed")
+                        break
+        except Exception as e:
+            print(f"Connection error: {e}")
+        
+        print("Reconnecting in 3 seconds...")
+        await asyncio.sleep(3)
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description='WebSocket Receiver Client')
+    parser.add_argument('stream_id', type=str, nargs='?', default=str(int(time.time())),
+                        help='Stream ID (timestamp) to connect to. Should match the sender.')
+    
+    args = parser.parse_args()
+    
+    if args.stream_id is None:
+        print("Warning: No stream_id provided. Using current timestamp, which might not match sender.")
+        
+    try:
+        asyncio.run(receive_messages(123456))
+    except KeyboardInterrupt:
+        print("\nStopped by user")