Add Avri documentation (#11867)

* Add Avri documentation

* Bump version

* Update description to new style

* Code review comments

* Update source/_integrations/sensor.avri.markdown

Co-Authored-By: springstan <46536646+springstan@users.noreply.github.com>

* Update source/_integrations/sensor.avri.markdown

Co-Authored-By: springstan <46536646+springstan@users.noreply.github.com>

* Remove empty default

* Bump ha release version

* ✏️ Tweak

Co-authored-by: springstan <46536646+springstan@users.noreply.github.com>
Co-authored-by: Klaas Schoute <klaas_schoute@hotmail.com>

source/_integrations/sensor.avri.markdown

@@ -0,0 +1,51 @@
+---
+title: Avri
+description: Instructions on how to set up Avri Waste sensor within Home Assistant.
+logo: avri.jpeg
+ha_category: 
+  - Sensor
+ha_iot_class: Cloud Polling
+ha_release: 0.107
+ha_codeowners:
+  - '@timvancann'
+---
+
+The `Avri Waste` platform allows you to track the next scheduled waste pickup and the type of waste from [Avri](https://www.avri.nl/). 
+
+## Configuration
+
+To enable this sensor, add the following lines to your `configuration.yaml`:
+
+```yaml
+# Example configuration.yaml entry
+sensor:
+  - platform: avri
+    zip_code: YOUR_ZIP_CODE
+    house_number: YOUR_HOUSE_NUMBER
+```
+
+{% configuration %}
+zip_code:
+  description: Your zip code 
+  required: true
+  type: string
+house_number:
+  description: Your house number
+  required: true
+  type: integer
+house_number_extension:
+  description: Your house number extension
+  required: false
+  type: string
+county_code:
+  description: Your country code
+  required: false
+  type: string
+  default: NL
+{% endconfiguration %}
+
+The default frequency for pulling data from the Avri API is once every 4 hours. If the Avri API does not return any pickup days the state of the sensor is set to `unknown`.
+
+<p class='note warning'>
+The Avri sensor uses an unofficial API to obtain data. Use it at your own risk.
+</p>