feat: 新增技能编排引擎和工作流构建器组件

refactor: 统一Hands系统常量到单个源文件
refactor: 更新Hands中文名称和描述

fix: 修复技能市场在连接状态变化时重新加载
fix: 修复身份变更提案的错误处理逻辑

docs: 更新多个功能文档的验证状态和实现位置
docs: 更新Hands系统文档

test: 添加测试文件验证工作区路径

crates/zclaw-runtime/src/tool/builtin/file_write.rs

@@ -42,7 +42,7 @@ impl Tool for FileWriteTool {
     }
 
     async fn execute(&self, input: Value, _context: &ToolContext) -> Result<Value> {
-        let path = input["path"].as_str()
+        let _path = input["path"].as_str()
             .ok_or_else(|| ZclawError::InvalidInput("Missing 'path' parameter".into()))?;
         let content = input["content"].as_str()
             .ok_or_else(|| ZclawError::InvalidInput("Missing 'content' parameter".into()))?;

crates/zclaw-runtime/src/tool/builtin/shell_exec.rs

@@ -1,10 +1,9 @@
 //! Shell execution tool with security controls
 
 use async_trait::async_trait;
-use serde::{Deserialize, Serialize};
+use serde::Deserialize;
 use serde_json::{json, Value};
 use std::collections::HashSet;
-use std::io::{Read, Write};
 use std::process::{Command, Stdio};
 use std::time::{Duration, Instant};
 use zclaw_types::{Result, ZclawError};