feat: add ample demos to @pureadmin/table (#379)

* feat: add ample demos to @pureadmin/table

src/views/pure-table/components/customIndex.vue

@@ -0,0 +1,30 @@
+<script setup lang="ts">
+import { tableData } from "./data";
+
+const indexMethod = (index: number) => {
+  return index * 2;
+};
+
+const columns: TableColumnList = [
+  {
+    type: "index",
+    index: indexMethod
+  },
+  {
+    label: "日期",
+    prop: "date"
+  },
+  {
+    label: "姓名",
+    prop: "name"
+  },
+  {
+    label: "地址",
+    prop: "address"
+  }
+];
+</script>
+
+<template>
+  <pure-table :data="tableData" :columns="columns" />
+</template>