Add OVO Energy Integration Docs (#13583)

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

source/_integrations/ovo_energy.markdown

@@ -0,0 +1,33 @@
+---
+title: OVO Energy
+description: Instructions on how to integrate OVO Energy with Home Assistant.
+ha_category:
+  - Energy
+  - Sensor
+ha_release: 0.114
+ha_iot_class: Cloud Polling
+ha_config_flow: true
+ha_codeowners:
+  - "@timmo001"
+ha_domain: ovo_energy
+---
+
+The `ovo_energy` integration allows you to monitor your energy consumption data
+in Home Assistant.
+
+## Configuration
+
+Menu: **Configuration** -> **Integrations**.
+
+Click on the `+` sign to add an integration and click on **OVO Energy**.
+After completing the configuration flow, the OVO Energy integration will be
+available.
+
+## Sensors
+
+This integration provides a few sensors for OVO Energy:
+
+- Last Electricity Reading - Last meter reading consumption in kWh.
+- Last Gas Reading - Last meter reading consumption in kWh.
+- Last Electricity Cost - Last meter reading electricity cost.
+- Last Gas Cost - Last meter reading gas cost.