make tag list modular, put on homepage

site/_includes/collection.njk

@@ -12,13 +12,7 @@ eleventyComputed:
   {% set tag = page.fileSlug %}
   {% if collections[tag] %}
     {% if tag === "posts" %}
-      <div style="--totalTags:{{ collections.categories | dictsort | length }}">
-        {%- for tag, data in collections.categories -%}
-          <a class="button tag" style="--tagIndex:{{ collections.categories[tag].id }}" href="/tags/{{ tag | slugify }}/">{{ tag }}
-            <span class="tagCount">{{ data.count }}</span>
-          </a>
-        {%- endfor -%}
-      </div>
+      {% include "-taglist.njk" %}
     {% endif %}
     {{ collectionList(tag) }}
   {% endif %}