feat: use django-hijack to switch user accounts

Resolves #74

people/templates/people/person/detail_full.html

@@ -42,6 +42,13 @@
             href="{% url 'password_change' %}?next={{ person.get_absolute_url }}">Change Password</a>
     {% endif %}
 
+    {% if request.user.is_superuser and person.user %}
+        <form style="display: inline;" action="/hijack/{{ person.user.pk }}/" method="post">
+            {% csrf_token %}
+            <button class="btn btn-warning" type="submit">Hijack {{ person.name }}</button>
+        </form>
+    {% endif %}
+
     <hr>
 
     <div id="map" style="height: 800px; width: 100%"></div>