feat(tree): add tree component and wip workspace

docs/docs/zh-CN/components/tree.md

@@ -0,0 +1,56 @@
+::: demo
+
+<template>
+  <lay-tree
+    :data="data"
+  >
+  </lay-tree>
+</template>
+
+<script setup>
+import { ref } from 'vue' 
+
+ const data = ref([{
+    title: '江西'
+    ,id: 1
+    ,children: [{
+      title: '南昌'
+      ,id: 1000
+      ,children: [{
+        title: '青山湖区'
+        ,id: 10001
+      },{
+        title: '高新区'
+        ,id: 10002
+      }]
+    },{
+      title: '九江'
+      ,id: 1001
+    },{
+      title: '赣州'
+      ,id: 1002
+    }]
+  },{
+    title: '广西'
+    ,id: 2
+    ,children: [{
+      title: '南宁'
+      ,id: 2000
+    },{
+      title: '桂林'
+      ,id: 2001
+    }]
+  },{
+    title: '陕西'
+    ,id: 3
+    ,children: [{
+      title: '西安'
+      ,id: 3000
+    },{
+      title: '延安'
+      ,id: 3001
+    }]
+  }])
+</script>
+
+:::