feat: publicize doc implemetation

one/docs/demo/date-picker/range.vue

@@ -0,0 +1,54 @@
+<template>
+<article>
+  <section>
+    <h4>Clearable</h4>
+    <veui-date-picker
+      v-model="range"
+      range
+      clearable
+    />
+  </section>
+  <section>
+    <h4>Customizable placeholder</h4>
+    <veui-date-picker
+      v-model="range"
+      class="custom"
+      range
+      placeholder="Pick a date range..."
+    />
+  </section>
+</article>
+</template>
+
+<script>
+import { DatePicker } from 'veui'
+
+export default {
+  components: {
+    'veui-date-picker': DatePicker
+  },
+  data () {
+    return {
+      range: null
+    }
+  }
+}
+</script>
+
+<style lang="less" scoped docs>
+section:not(:last-child) {
+  margin-bottom: 20px;
+}
+
+h4 {
+  margin-top: 0;
+}
+</style>
+
+<docs>
+支持 `v-model`，选择日期范围时数据类型为 `[Date, Date]`。
+</docs>
+
+<docs locale="en-US">
+Supports `v-model`, with value type being `[Date, Date]` when selecting a date range.
+</docs>