Add Gladys Assistant compatibility in README (#17686)

* Add Gladys Assistant integration in README

* Fix indentation

* Add <br> to align items

* Test with just one br

README.md

@@ -56,6 +56,8 @@ Zigbee2MQTT integrates well with (almost) every home automation solution because
 - [Home Assistant OS](https://www.home-assistant.io/installation/): Using [the official addon](https://github.com/zigbee2mqtt/hassio-zigbee2mqtt)
 - Other installation: using instructions [here](https://www.zigbee2mqtt.io/guide/usage/integrations/home_assistant.html)
 
+<br>
+
 <img align="left" height="100px" width="100px" src="https://user-images.githubusercontent.com/2734836/47615848-b8dd8700-dabd-11e8-9d77-175002dd8987.png">
 
 ### [Domoticz](https://www.domoticz.com/)
@@ -63,6 +65,13 @@ Zigbee2MQTT integrates well with (almost) every home automation solution because
 
 <br>
 
+<img align="left" height="100px" width="100px" src="./images/gladys-assistant-logo.jpg">
+
+### [Gladys Assistant](https://gladysassistant.com/)
+- Integration implemented natively in Gladys Assistant. Read documentation [here](https://gladysassistant.com/docs/integrations/zigbee2mqtt/)
+
+<br>
+
 ## Architecture
 ![Architecture](images/architecture.png)