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-kernel/src/capabilities.rs

@@ -1,7 +1,7 @@
 //! Capability manager
 
 use dashmap::DashMap;
-use zclaw_types::{AgentId, Capability, CapabilitySet, Result, ZclawError};
+use zclaw_types::{AgentId, Capability, CapabilitySet, Result};
 
 /// Manages capabilities for all agents
 pub struct CapabilityManager {
@@ -53,7 +53,7 @@ impl CapabilityManager {
     }
 
     /// Validate capabilities don't exceed parent's
-    pub fn validate(&self, capabilities: &[Capability]) -> Result<()> {
+    pub fn validate(&self, _capabilities: &[Capability]) -> Result<()> {
         // TODO: Implement capability validation
         Ok(())
     }