Add changelog docblock

[sabbelasichon]

In Rector itself we have this nice little gem to add an @changelog docblock for every rule which is also outputted after running it. This is very helpful in order to understand why the change has to be done

[sabbelasichon]

Add custom PHPStan Rule https://github.com/sabbelasichon/typo3-rector/blob/main/utils/phpstan/src/Rules/AddChangelogDocBlockForRectorClassRule.php