Add devolo home network integration (#16389)

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

.textlintrc.json

@@ -13,7 +13,6 @@
         "ABB Solar PV",
         "ABB",
         "Abode",
-        "AC",
         "Acer",
         "Actiontec",
         "AdGuard Home",

source/_integrations/devolo_home_network.markdown

@@ -0,0 +1,46 @@
+---
+title: devolo Home Network
+description: Instructions on how to integrate devolo Home Network devices with Home Assistant.
+ha_category: 
+  - Sensor
+ha_release: '2021.12'
+ha_iot_class: Local Pull
+ha_config_flow: true
+ha_codeowners:
+  - '@2Fake'
+  - '@Shutgun'
+ha_domain: devolo_home_network
+ha_quality_scale: platinum
+---
+
+The devolo Home Network integration allows you to monitor your PLC network.
+
+{% include integrations/config_flow.md %}
+
+## Device Types
+
+Currently the following device types within Home Assistant are supported.
+
+### Sensors
+
+* Number of connected wifi clients
+  * Updates every 10 seconds
+  * Is enabled by default
+* Number of neighbored wifi networks
+  * Updates every 5 minutes
+  * Is disabled by default because it runs quite long
+* Number of PLC devices in the same PLC network
+  * Updates every 5 minutes
+  * Is disabled by default because it typically rarely changes
+
+## Supported devolo Devices
+
+The list of supported devolo devices depends on the device firmware and the device features. The following devices were tested running firmware 5.6.0:
+
+* Magic 2 WiFi next
+* Magic 2 WiFi 2-1
+* Magic 1 WiFi mini
+* Magic 1 WiFi 2-1
+* dLAN 1200+ WiFi ac
+* dLAN 550+ Wifi
+* dLAN 550 WiFi