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.toml

@@ -1,6 +1,6 @@
 [build]
   publish = "dist"
-  command = "SKIP_KEYSTATIC=true npm run build"
+  command = "npm run build"
   ignore = "git log -1 --pretty=format:'%ae' | grep -v 'bcanata@hotmail.com'"
 [build.processing.html]
   pretty_urls = false