Magento Coding Standards adherence

[KamilBalwierz]

• avoiding use of superglobals
• securing use of serialize/unserialize
• escaping unescpaed output
• removed installers and provided declarative schema
• strict type checks on strpos results
• avoiding using include/require in dependency version detection

[github-actions]

Tpay Magento2 plugin - https://github.com/tpay-com/tpay-magento2-basic/actions/runs/18304997705/artifacts/4200560005