Fix code style (cspell, phpstan) and phpunit

@anybody marking for review, please have a look at it when you have time

@anybody Thanks for the feedback. The PR wasn't generated through AI, I tried review it through AI once that might have caused the errors i will get them rectified

I have force-pushed the version before the AI review please let me know if there is anything over the board or requires refinement

@anybody, normally I should not take novice ticket, I am just showcasing to some colleagues how the ddev and ddev modul contrib add-on works (mentoring for DDD2026) so I took it up to fix the minor issues.

@anybody I don't really mind. I didn't want to write on top of that. The AI review indeed shows that the code can be further improved. I provided only the minimum required changes for tests to go green and I didn't want to step on the previous MR only because there are changes there I find uneeded (and possibly LLM assisted :/)

To be fair though, as I said, this is part of mentoring work and I wouldn't mind if I didn't even receive credit for this. It can go to sapnil_biswas, it is up to you. Or as part of demonstration, you can even disregard my MR with all due respect.

:) Leaving it to you.

btw, @anybody, please, feel free to refactor my MR on top of MR!15. I can quickly do that.

@anybody I have updated the current branch.
Notes:
* I only kept the bare minimum necessary to fix the tests.
* I kept, however, a small typo which is in the phpdoc and don't think it makes a difference.
* Even though the previous commit had attribute declaration for the dataprovider, I kept the legacy @dataProvider because the module does not have a composer.json and the info file shows support for ^8 so I wanted to be on the safe side.
* About

btw, @anybody, please, feel free to refactor my MR on top of MR!15

, I forgot to add a 2 words that makes it much different. It is "feel free to ASK ME to refactor.." :P

Thanks!