Add PEGELONLINE integration (#28282)

source/_integrations/pegel_online.markdown

@@ -0,0 +1,20 @@
+---
+title: PEGELONLINE
+description: Instructions on how to integrate Radarr sensors with Home Assistant
+ha_category:
+  - Environment
+  - Sensor
+ha_release: 2023.8
+ha_config_flow: true
+ha_iot_class: Cloud Polling
+ha_domain: 'pegel_online'
+ha_platforms:
+  - sensor
+ha_codeowners:
+  - '@mib1185'
+ha_integration_type: service
+---
+
+This integration uses the data from the German Federal Waterways and Shipping Administration (_Wasserstraßen- und Schifffahrtsverwaltung des Bundes_) [PEGELONLINE](https://www.pegelonline.wsv.de/) to provide water level sensors.
+
+{% include integrations/config_flow.md %}