feat: 添加虚拟表格示例 (#1007)

* feat: 添加虚拟表格示例

src/views/table/edit/demo2/index.vue

@@ -0,0 +1,50 @@
+<script setup lang="ts">
+import { useColumns } from "./columns";
+
+const { editMap, columns, dataList, onEdit, onSave, onCancel } = useColumns();
+</script>
+
+<template>
+  <div class="flex">
+    <el-scrollbar>
+      <code>
+        <pre class="w-[400px]"> {{ dataList }}</pre>
+      </code>
+    </el-scrollbar>
+    <pure-table
+      row-key="id"
+      align-whole="center"
+      :header-cell-style="{
+        background: 'var(--el-fill-color-light)',
+        color: 'var(--el-text-color-primary)'
+      }"
+      :data="dataList"
+      :columns="columns"
+    >
+      <template #operation="{ row, index }">
+        <el-button
+          v-if="!editMap[index]?.editable"
+          class="reset-margin"
+          link
+          type="primary"
+          @click="onEdit(row, index)"
+        >
+          修改
+        </el-button>
+        <div v-else>
+          <el-button
+            class="reset-margin"
+            link
+            type="primary"
+            @click="onSave(index)"
+          >
+            保存
+          </el-button>
+          <el-button class="reset-margin" link @click="onCancel(index)">
+            取消
+          </el-button>
+        </div>
+      </template>
+    </pure-table>
+  </div>
+</template>