feat: add initial Nuxt frontend with SSR

frontend_nuxt/utils/markdown.js

@@ -0,0 +1,11 @@
+export function stripMarkdown(text) {
+  return text ? text.replace(/[#_*`>\-\[\]\(\)!]/g, '') : ''
+}
+
+export function stripMarkdownLength(text, length) {
+  const plain = stripMarkdown(text)
+  if (!length || plain.length <= length) {
+    return plain
+  }
+  return plain.slice(0, length) + '...'
+}