feat(main): Introduce USP block type and custom classes for HTML groups

This release adds a new "USP" (Unique Selling Proposition) block type,
allowing for flexible display of image-based selling points with optional links.

Additionally, administrators can now assign custom CSS classes to Custom HTML Groups,
enhancing layout and styling capabilities.

Includes a refinement to the FAQ accordion template to ensure questions without answers
do not display a collapse button, improving usability.

Updates module version to 1.13.0 with a database upgrade script for the new `custom_class` column.

src/Module/Install.php

@@ -50,6 +50,7 @@ trait Install
                 `id_ws_customhtml_group` INT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
                 `hook_name` VARCHAR(64) NOT NULL,
                 `title` VARCHAR(256) NOT NULL DEFAULT \'\',
+                `custom_class` VARCHAR(128) NOT NULL DEFAULT \'\',
                 `active` TINYINT(1) NOT NULL DEFAULT 1,
                 `ordering` INT(11) NOT NULL DEFAULT 0,
                 `date_add` DATETIME NOT NULL,