add theme nav & add pageIcon support of @lib/getNotionData

themes/nav/components/JumpToTopButton.js

@@ -0,0 +1,24 @@
+
+/**
+ * 跳转到网页顶部
+ * 当屏幕下滑500像素后会出现该控件
+ * @param targetRef 关联高度的目标html标签
+ * @param showPercent 是否显示百分比
+ * @returns {JSX.Element}
+ * @constructor
+ */
+const JumpToTopButton = ({ showPercent = false, percent, className }) => {
+  return (
+          <div
+              id="jump-to-top"
+              data-aos="fade-up"
+              data-aos-duration="300"
+              data-aos-once="false"
+              data-aos-anchor-placement="top-center"
+              className='fixed xl:right-4 right-2 mr-4 bottom-16 z-20'>
+              <i className='fas fa-chevron-up cursor-pointer p-2 rounded-full border bg-white dark:bg-hexo-black-gray' onClick={() => { window.scrollTo({ top: 0, behavior: 'smooth' }) }} />
+          </div>
+  )
+}
+
+export default JumpToTopButton