Add docs about how to use the wireshark baidu_std dissector

docs/cn/wireshark_baidu_std.md

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+[English version](../en/wireshark_baidu_std.md)
+
+# 介绍
+
+`wireshark_baidu_std.lua` 是针对 [`baidu_std`](baidu_std.md) 协议的 `Wireshark` 解析插件，同时支持 [`streaming_rpc`](streaming_rpc.md) 协议的解析。
+
+请求包的解析示例：
+
+![request](../images/wireshark_baidu_std_request.png)
+
+响应包的解析示例：
+
+![response](../images/wireshark_baidu_std_response.png)
+
+
+## 使用方式
+
+1. 将 [`wireshark_baidu_std.lua`](../../tools/wireshark_baidu_std.lua) 放到 "Personal Lua Plugins" 目录下；
+1. 将 [`optionsl.proto`](../../src/brpc/options.proto)、[`streaming_rpc_meta.proto`](../../src/brpc/streaming_rpc_meta.proto) 以及 [`baidu_rpc_meta.proto`](../../src/brpc/policy/baidu_rpc_meta.proto) 放到 "Personal configuration" 目录下的 `protobuf` 目录中，目录如不存在可以手动创建；
+1. 参考 [Wireshark Protobuf](https://wiki.wireshark.org/Protobuf#protobuf-search-paths-settings) 配置 `Protobuf` 系统 proto 文件路经，如：`/opt/homebrew/opt/protobuf/include`
+   ![wireshark-protobuf-search-paths](../images/wireshark_protobuf_search_paths.png)
+1. 可选，如需想使用相关字段进行过滤，可打开如下选项：
+   ![wireshark-protobuf-settings](../images/wireshark_protobuf_settings.png)
+
+上面提到的 "Personal Lua Plugins" 以及 "Personal configuration" 目录可查看 `About Wireshark` 的 `Folders` 页面，相关目录是平台相关的，macOS 下如：
+![About Wireshark](../images/wireshark_folders.png)

docs/en/wireshark_baidu_std.md

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+[中文版](../cn/wireshark_baidu_std.md)
+
+# Overview
+
+`wireshark_baidu_std.lua` is a Wireshark Lua dissector written for [`baidu_std`](../cn/baidu_std.md) protocol, including the [`streaming_rpc`](streaming_rpc.md) protocol.
+
+Example for the Echo request:
+
+![request](../images/wireshark_baidu_std_request.png)
+
+Example for the Echo response:
+
+![response](../images/wireshark_baidu_std_response.png)
+
+
+## How to use
+
+1. Put [`wireshark_baidu_std.lua`](../../tools/wireshark_baidu_std.lua) under "Personal Lua Plugins"；
+1. And put [`optionsl.proto`](../../src/brpc/options.proto), [`streaming_rpc_meta.proto`](../../src/brpc/streaming_rpc_meta.proto) and [`baidu_rpc_meta.proto`](../../src/brpc/policy/baidu_rpc_meta.proto) in `protobuf` directory under "Personal configuration", create if not exist；
+1. Set `Protobuf Search Paths` for Protobuf official library include directory(e.g. `/opt/homebrew/opt/protobuf/include`), see [Wireshark Protobuf](https://wiki.wireshark.org/Protobuf#protobuf-search-paths-settings) for more details.
+   ![wireshark-protobuf-search-paths](../images/wireshark_protobuf_search_paths.png)
+1. Optional, turn on `Dissect Protobuf fields as Wireshark fields` if you want to use related `baidu_std` fields for filtering:
+   ![wireshark-protobuf-settings](../images/wireshark_protobuf_settings.png)
+
+The "Personal Lua Plugins" and "Personal configuration" folders above can be found under the `Folders` page of `About Wireshark`, for macOS:
+![About Wireshark](../images/wireshark_folders.png)