Enable KeyStatic CMS for production

Changes:
- Added Netlify adapter for server-side rendering
- Changed output mode from static to server
- Updated KeyStatic storage from local to GitHub
- Removed SKIP_KEYSTATIC from Netlify build
- KeyStatic Admin UI will be available at /keystatic

Features:
- Server-side rendering with Netlify Functions
- GitHub integration for content management
- Production-ready KeyStatic Admin UI

Co-Authored-By: Claude <noreply@anthropic.com>

.netlify/build/pages/rss.xml.astro.mjs

@@ -0,0 +1,34 @@
+import { getRssString } from '@astrojs/rss';
+import { S as SITE, M as METADATA, a as getPermalink } from '../chunks/permalinks_BMxSf01e.mjs';
+import { f as fetchPosts } from '../chunks/blog_J6XM7OAu.mjs';
+export { renderers } from '../renderers.mjs';
+
+const GET = async () => {
+  const posts = await fetchPosts();
+  const rss = await getRssString({
+    title: `${SITE.name}’s Blog`,
+    description: METADATA?.description,
+    site: "https://www.radio.org.tr",
+    items: posts.map((post) => ({
+      link: getPermalink(post.permalink, "post"),
+      title: post.title,
+      description: post.excerpt,
+      pubDate: post.publishDate
+    })),
+    trailingSlash: SITE.trailingSlash
+  });
+  return new Response(rss, {
+    headers: {
+      "Content-Type": "application/xml"
+    }
+  });
+};
+
+const _page = /*#__PURE__*/Object.freeze(/*#__PURE__*/Object.defineProperty({
+  __proto__: null,
+  GET
+}, Symbol.toStringTag, { value: 'Module' }));
+
+const page = () => _page;
+
+export { page };