Is it possible to show in the checkout a list of radio buttons showing different payments such as:
* Payment on receipt of invoice
* Payment on delivery
* Payment on pickup
* Bank transfer
The idea is that if the user selects one of those it can proceed with the checkout without specifying any other payment data.
Is it possible to add custom payments without changing the checkout template? If not possible, how should I proceed to change the checkout template? I saw from the admin panel that it loads "checkout.inc.twig"; can I just customize this component or I need to write a full template, publish it and set its url in checkkout "remote template url" field?