Override tags field which was harkening back to Octavia anyway

But simplify dramatically since we're taking over the 'label' part from field config.

agaric/templates/field/field--field-tags.html.twig

@@ -0,0 +1,29 @@
+{#
+/**
+ * @file
+ *
+ * Available variables:
+ * - attributes: HTML attributes for the containing element.
+ * - label_hidden: Whether to show the field label or not.
+ * - title_attributes: HTML attributes for the title.
+ * - label: The label for the field.
+ * - multiple: TRUE if a field can contain multiple items.
+ * - items: List of all the field items. Each item contains:
+ *   - attributes: List of HTML attributes for each item.
+ *   - content: The field item's content.
+ * - entity_type: The entity type to which the field belongs.
+ * - field_name: The name of the field.
+ * - field_type: The type of the field.
+ * - label_display: The display settings for the label.
+ *
+ * @see template_preprocess_field()
+ */
+#}
+
+<h3>More about...</h3>
+<p>
+{% for item in items %}
+  {% if loop.length > 1 and loop.index == loop.length %}and {% endif %}
+  <strong>{{ item.content }}</strong>{% if loop.length > 2 and not loop.last %}, {% endif %}
+{% endfor %}
+</p>