Added documentation for Schluter integration (#11848)

* Added documentation for Schluter integration

* Remove time_out configuration option

* ⬆️ ha_release 0.108

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

source/_integrations/schluter.markdown

@@ -0,0 +1,50 @@
+---
+title: Schluter
+description: Instructions on how to integrate your Schluter DITRA-HEAT-E-WiFi thermostat into Home Assistant.
+logo: schluter.png
+ha_category:
+  - Climate
+ha_release: 0.108
+ha_iot_class: Cloud Polling
+---
+
+The `schluter` integration allows you to integrate your [Schluter-DITRA-HEAT-E-WiFi](https://www.schluter.com/schluter-us/en_US/ditra-heat-wifi) electric floor heating thermostat in Home Assistant.
+
+<div class='note'>
+You will need to create a Schluter DITRA-HEAT account and register your thermostat with it. This can be done via the thermostat touchscreen, where an email will be sent to you to confirm your account.
+</div>
+
+## Configuration
+
+You will need your Schluter login information (email and password) to use this module.
+
+To set it up, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+schluter:
+  username: YOUR_SCHLUTER_EMAIL
+  password: YOUR_SCHLUTER_PASSWORD
+```
+
+{% configuration %}
+username:
+  description: The email for accessing your Schluter account.
+  required: true
+  type: string
+password:
+  description: The password for accessing your Schluter account.
+  required: true
+  type: string
+{% endconfiguration %}
+
+Once Home Assistant is started, you will have access to any thermostats registered with your account.
+
+### Supported Features
+
+Currently, this integration supports the following features:
+
+- Retrieving current temperature & target temperature
+- Setting target temperature
+
+When adjusting the temperature via Home Assistant, it will place the thermostat in "permanent mode", meaning schedules programmed within the thermostat will be ignored. You can return to scheduled mode by pressing the "Return to Schedule" button on the thermostat.