replace slippers with django-cotton

main reason: slippers cannot pass request via context inside its
components, making it annoying to use template takes that take request.
more reasons: not actively worked on, no named slots, having to define
components in components.yaml + new components do not get registered
without restarting server

games/templates/cotton/table_row.html

@@ -0,0 +1,16 @@
+<tr class="odd:bg-white odd:dark:bg-gray-900 even:bg-gray-50 even:dark:bg-gray-800 dark:border-gray-700 hover:bg-gray-50 dark:hover:bg-gray-600 border-b">
+    {% if slot %}
+        {{ slot }}
+    {% else %}
+        {% for td in data %}
+            {% if forloop.first %}
+                <th scope="row"
+                    class="px-6 py-4 font-medium text-gray-900 whitespace-nowrap dark:text-white">{{ td }}</th>
+            {% else %}
+                <c-table-td>
+                {{ td }}
+                </c-table-td>
+            {% endif %}
+        {% endfor %}
+    {% endif %}
+</tr>