feat(Pagination): pagination item custom render (#7222)

* feat(Pagination): pagination item custom render

* fix(Pagination): fix test result

* fix(Pagination): expose page object directly

src/pagination/demo/index.vue

@@ -31,6 +31,22 @@
         :next-text="t('nextText')"
       />
     </demo-block>
+
+    <demo-block :title="t('title4')">
+      <van-pagination
+        v-model="currentPage4"
+        :total-items="125"
+        :show-page-size="5"
+      >
+        <template #prev-text>
+          <van-icon name="arrow-left" />
+        </template>
+        <template #next-text>
+          <van-icon name="arrow" />
+        </template>
+        <template #page="{ text }">{{ text }}</template>
+      </van-pagination>
+    </demo-block>
   </demo-section>
 </template>
 
@@ -40,12 +56,14 @@ export default {
     'zh-CN': {
       title2: '简单模式',
       title3: '显示省略号',
+      title4: '自定义渲染',
       prevText: '上一页',
       nextText: '下一页',
     },
     'en-US': {
       title2: 'Simple Mode',
       title3: 'Show ellipses',
+      title4: 'Custom Render',
       prevText: 'Prev',
       nextText: 'Next',
     },
@@ -56,6 +74,7 @@ export default {
       currentPage1: 1,
       currentPage2: 1,
       currentPage3: 1,
+      currentPage4: 1,
     };
   },
 };