chore: import upstream snapshot with attribution

apps/sim/app/(landing)/library/rss.xml/route.ts

@@ -0,0 +1,49 @@
+import { NextResponse } from 'next/server'
+import { latestModified } from '@/lib/content/utils'
+import { SITE_URL } from '@/lib/core/utils/urls'
+import { getAllPostMeta } from '@/lib/library/registry'
+import { LIBRARY_SECTION } from '@/lib/library/seo'
+
+export const revalidate = 3600
+
+export async function GET() {
+  const posts = await getAllPostMeta()
+  const items = posts.slice(0, 50)
+  const site = SITE_URL
+  const lastBuildDate = (latestModified(items) ?? new Date()).toUTCString()
+
+  const xml = `<?xml version="1.0" encoding="UTF-8" ?>
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
+  <channel>
+    <title>Sim ${LIBRARY_SECTION.name}</title>
+    <link>${site}</link>
+    <description>${LIBRARY_SECTION.description}</description>
+    <language>en-us</language>
+    <lastBuildDate>${lastBuildDate}</lastBuildDate>
+    <atom:link href="${site}${LIBRARY_SECTION.basePath}/rss.xml" rel="self" type="application/rss+xml" />
+    ${items
+      .map(
+        (p) => `
+    <item>
+      <title><![CDATA[${p.title}]]></title>
+      <link>${p.canonical}</link>
+      <guid>${p.canonical}</guid>
+      <pubDate>${new Date(p.date).toUTCString()}</pubDate>
+      <description><![CDATA[${p.description}]]></description>
+      ${(p.authors || [p.author])
+        .map((a) => `<author><![CDATA[${a.name}${a.url ? ` (${a.url})` : ''}]]></author>`)
+        .join('\n')}
+      ${p.tags.map((t) => `<category><![CDATA[${t}]]></category>`).join('\n      ')}
+    </item>`
+      )
+      .join('')}
+  </channel>
+</rss>`
+
+  return new NextResponse(xml, {
+    headers: {
+      'Content-Type': 'application/xml; charset=utf-8',
+      'Cache-Control': 'public, s-maxage=3600, stale-while-revalidate=86400',
+    },
+  })
+}