feat: Add 7 new stacks (Batch 2)

Added stacks:
- nextcloud-aio (Cloud storage)
- wordpress (CMS)
- searxng (Meta search)
- authentik (SSO provider)
- jellyfin (Media server)

All stacks include:
- compose.yml with proper configuration
- README.md with deployment info
- stack.toml for Komodo Resource Sync

stacks/wordpress/compose.yml

@@ -0,0 +1,40 @@
+services:
+  wordpress:
+    image: wordpress:latest
+    container_name: wordpress
+    restart: unless-stopped
+    ports:
+      - "127.0.0.1:8080:80"
+    volumes:
+      - wordpress_data:/var/www/html
+    environment:
+      - WORDPRESS_DB_HOST=wordpress-db
+      - WORDPRESS_DB_USER=wordpress
+      - WORDPRESS_DB_PASSWORD=wordpress
+      - WORDPRESS_DB_NAME=wordpress
+    depends_on:
+      - wordpress-db
+    networks:
+      - wordpress-network
+
+  wordpress-db:
+    image: mysql:8.0
+    container_name: wordpress-db
+    restart: unless-stopped
+    volumes:
+      - wordpress_db:/var/lib/mysql
+    environment:
+      - MYSQL_DATABASE=wordpress
+      - MYSQL_USER=wordpress
+      - MYSQL_PASSWORD=wordpress
+      - MYSQL_ROOT_PASSWORD=rootpassword
+    networks:
+      - wordpress-network
+
+volumes:
+  wordpress_data:
+  wordpress_db:
+
+networks:
+  wordpress-network:
+    driver: bridge