OXID 6.5.0, PHP 8.1 and some fixes
- Removed the shop name from the 'User-Agent' in the request
- Added ireland as core country
- Moved documentation to https://wiki.fatchip.de/public/faqklarna
- Added compatibility with Aggrosoft PayPal Plus
- Added license to composer.json
- Move submit event interception to avoid breaking the chain