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/README.md

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+# WordPress
+
+📝 CMS / Blog Platform
+
+## Deploy in Komodo
+
+**Pfad:** `stacks/wordpress/`
+
+## Ports
+
+- `8080` - Web UI
+
+## Caddy
+
+```caddyfile
+blog.example.com {
+    reverse_proxy localhost:8080
+}
+```
+
+## Notes
+
+- Inklusive MySQL Datenbank
+- Passwort ändern nach erstem Login!

stacks/wordpress/compose.yml

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+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

stacks/wordpress/stack.toml

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+[[stacks]]
+name = "wordpress"
+description = "CMS / Blog Platform"
+compose_path = "compose.yml"