Closes #189, Closes #158: Add draw.io XML export (#277)

* Added export to draw.io XML

* Corrected missing newline at end of file

* init

* moved to api call

---------

Co-authored-by: mattieserver <3049868+mattieserver@users.noreply.github.com>

netbox_topology_views/templates/netbox_topology_views/htmx_topology.html

@@ -8,9 +8,13 @@
     <div class="controls">
     	<div class="control-group">
 			{% block extra_controls %}{% endblock %}
+			<a id="btnDownloadXml" class="btn btn-sm btn-info" href="#">
+				<i class="mdi mdi-download"></i>
+				Download XML
+			</a>
 			<a id="btnDownloadImage" class="btn btn-sm btn-info" href="#">
 				<i class="mdi mdi-download"></i>
-				Download
+				Download PNG
 			</a>
             <a class="btn  btn-sm btn-danger" data-bs-dismiss="modal">
                 <i class="mdi mdi-close-thick"></i>
@@ -36,4 +40,4 @@
     const brokenImage = '{{ broken_image }}';
     const topologyData = {{ topology_data | safe }};
 </script>
-<script src="{% static 'netbox_topology_views/js/app.js' %}?ver={{ epoch }} " defer></script>
+<script src="{% static 'netbox_topology_views/js/app.js' %}?ver={{ epoch }} " defer></script>

netbox_topology_views/templates/netbox_topology_views/index.html

@@ -16,9 +16,13 @@
   <div class="controls">
     	<div class="control-group">
 			{% block extra_controls %}{% endblock %}
+			<a id="btnDownloadXml" class="btn btn-sm btn-info" href="#">
+				<i class="mdi mdi-download"></i>
+				Download XML
+			</a>
 			<a id="btnDownloadImage" class="btn btn-sm btn-info" href="#">
 				<i class="mdi mdi-download"></i>
-				Download
+				Download PNG
 			</a>
     	</div>
 	</div>