The vendor was renamed from `wrm` to `werkraummedia`. And the namespace vendor was renamed from `Wrm` to `WerkraumMedia`. That way all references to PHP classes as well as the package name itself need to be adjusted.
Use php-cs-fixer as within other extensions. Use same configuration. Apply configuration
We switched to PHPDataSets already but didn't migrate all usages. This commit now migrates all usages left behind.
