docs: 添加 websocket 模块文档并更新 sidebar

- 添加 JavaScript 和 Lua 的 websocket 模块文档
- 更新 sidebar.md 添加 websocket 模块链接
- 更新主 README 添加 websocket 模块引用

Author: Zing

docs/_sidebar.md

@@ -13,6 +13,7 @@
     - [dotocr](js_engine/model/autogo/dotocr/README.md)
     - [files](js_engine/model/autogo/files/README.md)
     - [http](js_engine/model/autogo/http/README.md)
+    - [websocket](js_engine/model/autogo/websocket/README.md)
     - [hud](js_engine/model/autogo/hud/README.md)
     - [images](js_engine/model/autogo/images/README.md)
     - [ime](js_engine/model/autogo/ime/README.md)
@@ -41,6 +42,7 @@
     - [dotocr](lua_engine/model/autogo/dotocr/README.md)
     - [files](lua_engine/model/autogo/files/README.md)
     - [http](lua_engine/model/autogo/http/README.md)
+    - [websocket](lua_engine/model/autogo/websocket/README.md)
     - [hud](lua_engine/model/autogo/hud/README.md)
     - [images](lua_engine/model/autogo/images/README.md)
     - [ime](lua_engine/model/autogo/ime/README.md)