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.

views/templates/hook/customhtml_block.tpl

@@ -1,7 +1,7 @@
 {if !empty($groupList)}
 <div class="customhtml-container {$hookName|escape:'html':'UTF-8'}--container">
     {foreach from=$groupList item="group"}
-    <div class="customhtml-group customhtml-group-{$group.id_ws_customhtml_group|intval} row">
+    <div class="customhtml-group customhtml-group-{$group.id_ws_customhtml_group|intval} row{if !empty($group.custom_class)} {$group.custom_class|escape:'html':'UTF-8'}{/if}">
         {foreach from=$group.blocks item="block"}
         <div class="customhtml-block col{if !empty($block.custom_class)} {$block.custom_class|escape:'html':'UTF-8'}{/if}">
             {assign var="customhtmlOverridePath" value="{$smarty.const._PS_THEME_DIR_}modules/ws_customhtml/views/templates/hook/{$hookName}/{$block.type}.tpl"}
@@ -17,6 +17,8 @@
                 {include file="module:ws_customhtml/views/templates/hook/_banner.tpl" block=$block}
             {elseif $block.type == 'alert'}
                 {include file="module:ws_customhtml/views/templates/hook/_alert.tpl" block=$block}
+            {elseif $block.type == 'usp'}
+                {include file="module:ws_customhtml/views/templates/hook/_usp.tpl" block=$block}
             {else}
                 {if $block.show_title && !empty($block.title)}
                 <div class="customhtml-title">{$block.title|escape:'html':'UTF-8'}</div>