Annotation to PHP Attributes conversion

Thanks to Tag1 for providing a small budget to explore AI. I used Claude mainly. Initially I asked it to convert all the things. That seemed too much in one pass. So then I asked it to suggest a Rector configuration that would help here. It did a decent job, but then I was still left with fully importing class names manually. Of note, rector didn't seem to want to update/convert all of the PHPUnit attributes. I tried to convince it, even pulled out xdebug to see why it was ignoring some of the conversions for the @covers* cases. But to keep thing moving (and so I didn't fall prey to the issue where AI actually _slows_ things down) I opted use PHPStorm's automation to quickly and manually convert the few remaining phpunit annotations.