Add image and badges to README

Author: dg

readme.md

@@ -1,5 +1,8 @@
 # Nette PHPStan Rules
 
+
+<img width="2912" height="1440" alt="image" src="https://github.com/user-attachments/assets/c231ed47-a413-4dd2-81ef-83e52c080427" />
+
 [![Downloads this Month](https://img.shields.io/packagist/dm/nette/phpstan-rules.svg)](https://packagist.org/packages/nette/phpstan-rules)
 [![Tests](https://github.com/nette/phpstan-rules/workflows/Tests/badge.svg?branch=master)](https://github.com/nette/phpstan-rules/actions)
 [![Latest Stable Version](https://poser.pugx.org/nette/phpstan-rules/v/stable)](https://github.com/nette/phpstan-rules/releases)