Document new Airzone integration (#21903)

Co-authored-by: Franck Nijhof <frenck@frenck.nl>

source/_integrations/airzone.markdown

@@ -0,0 +1,30 @@
+---
+title: Airzone
+description: Instructions on how to integrate Airzone within Home Assistant.
+ha_release: 2022.4
+ha_category:
+  - Sensor
+ha_iot_class: Local Polling
+ha_config_flow: true
+ha_domain: airzone
+ha_platforms:
+  - sensor
+---
+
+This integration allows getting values from the local API of Airzone HVAC zoning systems.
+
+There is currently support for the following device types within Home Assistant:
+
+- Sensor
+
+{% include integrations/config_flow.md %}
+
+{% configuration_basic %}
+Host:
+  description: "Network IP address"
+Port:
+  description: "Network port"
+{% endconfiguration_basic %}
+
+Only temperature and humidity sensors for each HVAC zone are supported right now.
+It should also be possible to control the different HVAC zones with climate devices.