redo html hierarchy and add basic css

templates/search.html

@@ -0,0 +1,6 @@
+{% block content %}
+    <form hx-get="/list" hx-replace-url="true" hx-target="#content">
+        <input type=text name=query />
+        <button type=submit>search</button>
+    </form>
+{% endblock %}