Fix PHPCS - PHPSTAN - CSPELL - ESLINT issues

I fixed all of the PHPSTAN / CSPELL / PHPCS issues, did some initial testing on forms and I had no issues, could need some extra review, I'll leave it as "Needs Review" for a while.

It seems like no one is using this module anymore, but maybe in the future someone will, I'll move this to "Fixed" and merge the MR, if anyone encounters any issue with this module, please let me know internally or open another issue.