Insufficient Documentation on PrometheusRule Alerts and Routing

[ankitdh7]

Problem
While testing alert configuration and routing based on the Alertmanager configuration and the PrometheusRule CRD, I found no documentation explaining the setup process or expected behavior. Without clear guidance, users cannot be certain that they are testing the configuration correctly, nor can they confidently determine if the outcomes are as intended or if there are deviations from expected functionality.

Actual
There is no documentation available explaining the use of the PrometheusRule CRD and alert routing with the provided Alertmanager configuration.

Expected
A comprehensive guide or documentation should be available, detailing how to configure alerts and routing using the PrometheusRule CRD and Alertmanager configuration. This should include the expected behavior for various scenarios so that any deviations can be easily identified as bugs.