feat: implement comprehensive blog system

Add dual-source blog system with Editor.js integration:
- Blog storage supporting repo-based (JSON) and database sources
- Admin panel with rich text editor using Editor.js
- Public news page with infinite scroll
- Individual blog post viewer page
- Categories management in admin
- Image upload functionality
- 4 SEO blog posts about WordPress with PluginCompass promotion
- 3 News blog posts about Plugin Compass
- API endpoints for CRUD operations
- Security and validation for admin operations

Closes blog feature request

chat/public/home.html

@@ -253,7 +253,7 @@
                     </p>
 
                     <div class="flex items-center gap-4 mt-4">
-                        <a href="/apps" class="inline-flex items-center px-6 py-3 bg-green-500 hover:bg-green-600 text-white rounded-full font-semibold shadow-md">
+                        <a href="/apps" class="inline-flex items-center px-6 py-3 bg-green-700 hover:bg-green-600 text-white rounded-full font-semibold shadow-md">
                             Get started <i class="fa-solid fa-arrow-right ml-2"></i>
                         </a>
                         <a href="/features" class="inline-flex items-center px-6 py-3 border border-gray-300 bg-white rounded-full font-medium hover:bg-gray-50">