Add geocaching integration (#22728)

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

source/_integrations/geocaching.markdown

@@ -0,0 +1,33 @@
+---
+title: Geocaching
+description: Instructions on how to integrate Geocaching accounts within Home Assistant.
+ha_category:
+  - Sensor
+ha_release: 2022.6
+ha_iot_class: Cloud Polling
+ha_config_flow: true
+ha_codeowners:
+  - '@Sholofly'
+  - '@reinder83'
+ha_domain: geocaching
+ha_platforms:
+  - sensor
+---
+
+Geocaching is a real-world, outdoor adventure that is happening all the time, all around the world. To play, participants use the Geocaching app and/or a GPS device to navigate to cleverly hidden containers called geocaches.
+
+The Geocaching integration in Home Assistant pulls data from your [Geocaching.com](https://www.geocaching.com/) account.
+
+{% include integrations/config_flow.md %}
+
+## Sensors
+
+The following sensors are available for each account:
+
+- Find count
+- Hide count
+- Favorite points
+- Souvenir count
+- Awarded favorite points
+
+![Authorized Geocaching developer](/images/integrations/geocaching/geocaching_authorized_developer.png) Powered by Geocaching HQ