[ticket/15538] Drop templates and icons folder, twig file extension

PHPBB3-15538

phpBB/styles/all/template/macros/icons/svg.twig

@@ -0,0 +1,9 @@
+{% spaceless %}
+	{% set TITLE_ID = TITLE ? TITLE|lower|replace({' ': '_'}) ~ '-' ~ random() %}
+
+	<svg class="o-icon o-icon-svg svg-{{ ICON ~ (CLASSES ? ' ' ~ CLASSES) }}" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"{% if TITLE %}{% if S_HIDDEN %} aria-hidden="true"{% endif %} aria-labelledby="{{ TITLE_ID }}"{% endif %} role="img"{{ ATTRIBUTES }}>
+		{% if TITLE %}<title id="{{ TITLE_ID }}">{{ lang(TITLE) }}</title>{% endif %}
+
+		{{ SOURCE }}
+	</svg>
+{% endspaceless %}