feat(guide): add Configarr to 3rd party Guide Sync tools

docs/Guide-Sync/index.md

@@ -67,4 +67,18 @@ Once set up, it is fully automated and checks for updates to custom formats and
 Recyclarr is a command line application utilizing configuration files to sync the guides to Radarr &
 Sonarr.
 
+## Configarr
+
+[Github](https://github.com/raydak-labs/configarr){:target="\_blank" rel="noopener noreferrer"} // [Documentation](https://configarr.raydak.de){:target="\_blank" rel="noopener noreferrer"}
+
+Configarr is a synchronization tool primarily designed to run as a scheduled job (e.g., Cron) within containerized environments like Docker or Kubernetes.
+Configarr is compatible with the Recyclarr templates until v7.4.0.
+It enables the use of all Custom Formats and Quality Profiles defined in TRaSH-Guides while also allowing users to create new Custom Formats tailored to their specific setup.
+
+Main features are:
+- Support all of TRaSH-Guide provided JSON structures (CustomFormats, QualityProfiles, Naming)
+- Customizability: Create and adjust everything as you need for your setup like own CustomFormats, different QualityProfiles, ...
+- Container focus for best support in Docker and Kubernetes environments
+- more in the Configarr docs
+
 --8<-- "includes/support.md"