README.md: Add badges and our logo

Author: nilmerg

README.md

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 # Icinga Reporting
 
+[![PHP Support](https://img.shields.io/badge/php-%3E%3D%207.0-777BB4?logo=PHP)](https://php.net/)
+![Build Status](https://github.com/icinga/icingaweb2-module-reporting/workflows/PHP%20Tests/badge.svg?branch=master)
+[![Github Tag](https://img.shields.io/github/tag/Icinga/icingaweb2-module-reporting.svg)](https://github.com/Icinga/icingaweb2-module-reporting)
+
+![Icinga Logo](https://icinga.com/wp-content/uploads/2014/06/icinga_logo.png)
+
 Icinga Reporting is the central component for reporting related functionality in the monitoring web frontend and
 framework Icinga Web 2. The engine allows you to create reports over a specified time period for ad-hoc and scheduled
 generation of reports. Other modules use the provided functionality in order to provide concrete reports.