feat: 添加多线程架构支持并优化性能

实现线程管理器以支持高并发场景，添加GIL-free模式提升Python 3.14下的多线程性能
新增B站API集成和本地文件服务器功能，改进镜像插件支持GIF处理
更新文档说明多线程架构和GIL-free模式的使用方法

core/ws.py

@@ -15,6 +15,7 @@ import asyncio
 import orjson
 from typing import TYPE_CHECKING, Any, Dict, Optional, cast
 import uuid
+import threading
 
 if TYPE_CHECKING:
     from .bot import Bot
@@ -59,6 +60,9 @@ class WS:
         self.self_id: int | None = None
         self.code_executor = code_executor
         
+        # 线程安全锁
+        self._pending_requests_lock = threading.RLock()
+        
         # 创建模块专用日志记录器
         self.logger = ModuleLogger("WebSocket")
 
@@ -123,9 +127,10 @@ class WS:
                 # 如果消息中包含 echo 字段，说明是 API 调用的响应
                 echo_id = data.get("echo")
                 if echo_id and echo_id in self._pending_requests:
-                    future = self._pending_requests.pop(echo_id)
-                    if not future.done():
-                        future.set_result(data)
+                    with self._pending_requests_lock:
+                        future = self._pending_requests.pop(echo_id)
+                        if not future.done():
+                            future.set_result(data)
                     continue
 
                 # 2. 处理上报事件
@@ -229,12 +234,13 @@ class WS:
         
         if self.ws:
             await self.ws.close()
-            
+        
         # 取消所有挂起的请求
-        for future in self._pending_requests.values():
-            if not future.done():
-                future.cancel()
-        self._pending_requests.clear()
+        with self._pending_requests_lock:
+            for future in self._pending_requests.values():
+                if not future.done():
+                    future.cancel()
+            self._pending_requests.clear()
         
         self.logger.success("WebSocket 客户端已关闭")
 
@@ -276,13 +282,15 @@ class WS:
 
         loop = asyncio.get_running_loop()
         future = loop.create_future()
-        self._pending_requests[echo_id] = future
-
+        with self._pending_requests_lock:
+            self._pending_requests[echo_id] = future
+        
         try:
             await self.ws.send(orjson.dumps(payload))
             return await asyncio.wait_for(future, timeout=30.0)
         except asyncio.TimeoutError:
-            self._pending_requests.pop(echo_id, None)
+            with self._pending_requests_lock:
+                self._pending_requests.pop(echo_id, None)
             self.logger.warning(f"API 调用超时: action={action}, params={params}")
             return create_error_response(
                 code=ErrorCode.TIMEOUT_ERROR,
@@ -290,7 +298,8 @@ class WS:
                 data={"action": action, "params": params}
             )
         except Exception as e:
-            self._pending_requests.pop(echo_id, None)
+            with self._pending_requests_lock:
+                self._pending_requests.pop(echo_id, None)
             self.logger.exception(f"API 调用异常: action={action}, error={str(e)}")
             return create_error_response(
                 code=ErrorCode.WS_MESSAGE_ERROR,