Add yolink integration document

source/_integrations/yolink.markdown

@@ -0,0 +1,37 @@
+---
+title: YoLink
+description: Instructions on how to integrate YoLink Devices into Home Assistant.
+ha_category:
+  - Binary Sensor
+  - Sensor
+  - Siren
+  - Switch
+ha_release: 2022.6
+ha_iot_class: Cloud Push
+ha_config_flow: true
+ha_codeowners:
+  - '@YoSmart-Inc'
+ha_domain: yolink
+ha_platforms:
+  - binary_sensor
+  - sensor
+  - siren
+  - switch
+ha_integration_type: integration
+---
+
+Integrates [YoLink](https://www.yosmart.com/) Devices into Home Assistant.
+
+{% include integrations/config_flow.md %}
+
+Unless configured otherwise, Home Assistant will use account linking provided by
+Nabu Casa for authenticating with YoLink, If you want to use separate credentials, please contact <service@yosmart.com> to obtain a `client_id` and `client_secret`. Then you can add your credentials via application credentials. Settings > Devices & Services > click the menu (three dots at the top right of the screen) and then **Application Credentials**. Enter your credentials in the pop-up window.
+
+The integration is tested and verified for the following devices from YoLink:
+
+* YS6604
+* YS7103
+* YS7704
+* YS7804/5
+* YS7904
+* YS8003