Adds a one-click service template for deploying WordPress on OpenLiteSpeed with MariaDB.

/claim #8264

What this adds

A new template at templates/compose/wordpress-with-openlitespeed.yaml that deploys:

• WordPress via the official litespeedtech/openlitespeed-wordpress image
• MariaDB 11 for the database

Features:

• Persistent volumes for WordPress files, LiteSpeed config, and DB data
• Auto-generated credentials via Coolify service variables
• Health checks on both containers
• Follows the same patterns as existing WordPress templates

Why OpenLiteSpeed

OpenLiteSpeed provides built-in page caching and generally better performance than Apache for WordPress workloads. The litespeedtech/openlitespeed-wordpress image is officially maintained and includes the LiteSpeed Cache plugin pre-configured.

Fixes #8264