Add configuration flow to PVOutput (#20837)

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

source/_integrations/pvoutput.markdown

@@ -7,38 +7,18 @@ ha_release: 0.33
 ha_iot_class: Cloud Polling
 ha_codeowners:
   - '@fabaff'
+  - '@frenck'
+ha_config_flow: true
 ha_domain: pvoutput
 ha_platforms:
   - sensor
 ---
 
-The `pvoutput` sensor platform consumes information from [PVOutput](https://pvoutput.org/) which were uploaded by your solar photovoltaic (PV) system.
+The PVOutput integration consumes information from [PVOutput](https://pvoutput.org/) which was uploaded by your solar photovoltaic (PV) system.
 
-To add PVOutput details to your installation, add the following to your `configuration.yaml` file:
+{% include integrations/config_flow.md %}
 
-```yaml
-# Example configuration.yaml entry
-sensor:
-  - platform: pvoutput
-    system_id: YOUR_SYSTEM_ID
-    api_key: YOUR_API_KEY
-```
-
-{% configuration %}
-api_key:
-  description: Your API key. A read-only key is fine.
-  required: true
-  type: string
-system_id:
-  description: The ID of your station.
-  required: true
-  type: string
-name:
-  description: Name of the sensor.
-  required: false
-  default: PVOutput
-  type: string
-{% endconfiguration %}
+## Extracting data into separate sensors
 
 To format the PVoutput sensor it's recommended to use the [template component](/topics/templating/). For example: