feat(theme): add footer frontmatter

docs/config/frontmatter/basic.md

@@ -227,3 +227,11 @@ permalink: /config/frontmatter/basic/
   当类型为 WatermarkOptions 时，表示当前页面水印配置。
 
   可以参考 [watermark-js-plus](https://zhensherlock.github.io/watermark-js-plus/zh/config/) 。
+
+### footer
+
+- 类型： `boolean`
+- 默认值： `true`
+- 详情：
+
+  当前文章是否 显示 页脚信息。

docs/en/config/frontmatter/basic.md

@@ -228,3 +228,11 @@ Display a badge on the right side of the article title.
   When the type is WatermarkOptions, it represents the watermark configuration for the current page.
 
   You can refer to [watermark-js-plus](https://zhensherlock.github.io/watermark-js-plus/zh/config/).
+
+### footer
+
+- Type: `boolean`
+- Default: `true`
+- Details:
+
+  Whether to display the footer for the current article.

theme/src/client/components/VPFooter.vue

@@ -4,21 +4,21 @@ import { onMounted, ref } from 'vue'
 import { useData, useSidebar } from '../composables/index.js'
 import { inBrowser } from '../utils/index.js'
 
-const { theme } = useData()
+const { theme, frontmatter } = useData()
 const { hasSidebar } = useSidebar()
 
 const footerHeight = useCssVar('--vp-footer-height', inBrowser ? document.body : null)
 const footer = ref<HTMLElement | null>(null)
 
 onMounted(() => {
-  if (theme.value.footer && footer.value)
+  if (theme.value.footer && frontmatter.value.footer !== false && footer.value)
     footerHeight.value = `${footer.value.offsetHeight}px`
 })
 </script>
 
 <template>
   <footer
-    v-if="theme.footer"
+    v-if="theme.footer && frontmatter.footer !== false"
     ref="footer"
     class="vp-footer"
     :class="{ 'has-sidebar': hasSidebar }"