[IMP] doc: define a layout for 'category index' pages

These pages were indexed by google but did not have any layout defined.

doc/_extensions/odoo/layout.html

@@ -230,7 +230,7 @@
       <main class="container-fluid {{ ' '.join(classes) }}">
         {% if pagename != master_doc %}
         <div class="row">
-          {% if 'has-toc' not in meta %}
+          {% if 'has-toc' not in meta and not (pagename in toc) %}
           <aside>
             <div class="navbar-aside text-center">
               {{ toc }}
@@ -242,7 +242,7 @@
             </div>
           </aside>
           {% endif %}
-          <article class="doc-body {% if 'has-toc' in meta %}doc-toc{% endif %}">
+          <article class="doc-body {% if 'has-toc' in meta %}doc-toc{% endif %}{% if pagename in toc%}index-category{% endif %}">
             {% endif %}
             {% block body %} {% endblock %}
           {% if pagename != master_doc %}</article>

doc/_extensions/odoo/static/style.css

@@ -12353,6 +12353,13 @@ article.doc-body section.doc-content:first-of-type > p:first-child {
     font-size: 22.5px;
   }
 }
+article.doc-body.index-category {
+  min-height: 300px;
+  min-height: 30vh;
+}
+article.doc-body.index-category li.toctree-l1 {
+  padding: 5px 0;
+}
 .content-switcher {
   margin-top: 1.5em;
 }

doc/_extensions/odoo/static/style.less

@@ -742,6 +742,15 @@ article.doc-body {
       .lead;
     }
   }
+
+  &.index-category {
+    min-height: 300px;
+    min-height: 30vh;
+
+    li.toctree-l1 {
+      padding: 5px 0;
+    }
+  }
 }
 
 .content-switcher {