feat(projects): 增加返回顶部功能

src/layouts/common/GlobalBackTop/index.vue

@@ -0,0 +1,13 @@
+<template>
+  <n-back-top :show="show" class="z-1000" />
+</template>
+
+<script lang="ts" setup>
+import { computed } from 'vue';
+import { useWindowScroll } from '@vueuse/core';
+
+const { y: scrollY } = useWindowScroll();
+
+const show = computed(() => scrollY.value > 180);
+</script>
+<style scoped></style>