chore: 在文档和代码中添加 currentId 属性，增强路由上下文信息

src/route.ts

@@ -26,6 +26,10 @@ export type RouteContext<T = { code?: number }, S = any> = {
   // 传递状态
   state?: S;
   // transfer data
+  /**
+   * 当前routerId
+   */
+  currentId?: string;
   /**
    * 当前路径
    */
@@ -314,6 +318,7 @@ export class QueryRouter implements throwError {
     const maxNextRoute = this.maxNextRoute;
     ctx = (ctx || {}) as RouteContext;
     ctx.currentPath = path;
+    ctx.currentId = route?.id;
     ctx.currentKey = key;
     ctx.currentRoute = route;
     ctx.index = (ctx.index || 0) + 1;