feat: 添加vue-flow流程图示例 (#1001)

* feat: 添加`vue-flow`流程图示例

src/router/enums.ts

@@ -1,29 +1,31 @@
 // 完整版菜单比较多，将 rank 抽离出来，在此方便维护
 
 const home = 0, // 平台规定只有 home 路由的 rank 才能为 0 ，所以后端在返回 rank 的时候需要从非 0 开始
-  components = 1,
-  able = 2,
-  table = 3,
-  list = 4,
-  result = 5,
-  error = 6,
-  frame = 7,
-  nested = 8,
-  permission = 9,
-  system = 10,
-  monitor = 11,
-  tabs = 12,
-  about = 13,
-  editor = 14,
-  flowchart = 15,
-  formdesign = 16,
-  board = 17,
-  ppt = 18,
-  guide = 19,
-  menuoverflow = 20;
+  vueflow = 1,
+  components = 2,
+  able = 3,
+  table = 4,
+  list = 5,
+  result = 6,
+  error = 7,
+  frame = 8,
+  nested = 9,
+  permission = 10,
+  system = 11,
+  monitor = 12,
+  tabs = 13,
+  about = 14,
+  editor = 15,
+  flowchart = 16,
+  formdesign = 17,
+  board = 18,
+  ppt = 19,
+  guide = 20,
+  menuoverflow = 21;
 
 export {
   home,
+  vueflow,
   components,
   able,
   table,