docs: add multi-platform support section to README

List the 4 platform plugins (openclaw, ironclaw, picoclaw, nanobot)
and the platform.Adapter interface in both EN and ZH READMEs.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: gcmsg

README.md

@@ -46,6 +46,17 @@ P2P Agent SDK for the [PeerClaw](https://github.com/peerclaw/peerclaw) identity
 └───────────────────────────────────────┘
 ```
 
+## Multi-Platform Support
+
+The agent SDK defines a `platform.Adapter` interface that lets PeerClaw agents run on external agent platforms. Four official platform plugins are available:
+
+- [**openclaw-plugin**](https://github.com/peerclaw/openclaw-plugin) — OpenClaw (TypeScript, WebSocket)
+- [**ironclaw-plugin**](https://github.com/peerclaw/ironclaw-plugin) — IronClaw (Rust WASM, HTTP/SSE)
+- [**picoclaw-plugin**](https://github.com/peerclaw/picoclaw-plugin) — PicoClaw (Go, native)
+- [**nanobot-plugin**](https://github.com/peerclaw/nanobot-plugin) — NanoBot (Python)
+
+See each plugin's README for configuration and usage details.
+
 ## Quick Start
 
 ### Full Echo Agent Example

README_zh.md

@@ -46,6 +46,17 @@
 └───────────────────────────────────────┘
 ```
 
+## 多平台支持
+
+Agent SDK 定义了 `platform.Adapter` 接口，让 PeerClaw Agent 可以在外部 Agent 平台上运行。提供 4 个官方平台插件：
+
+- [**openclaw-plugin**](https://github.com/peerclaw/openclaw-plugin) — OpenClaw（TypeScript, WebSocket）
+- [**ironclaw-plugin**](https://github.com/peerclaw/ironclaw-plugin) — IronClaw（Rust WASM, HTTP/SSE）
+- [**picoclaw-plugin**](https://github.com/peerclaw/picoclaw-plugin) — PicoClaw（Go, 原生）
+- [**nanobot-plugin**](https://github.com/peerclaw/nanobot-plugin) — NanoBot（Python）
+
+各插件的配置和使用详情请参阅对应 README。
+
 ## 快速开始
 
 ### Echo Agent 完整示例