Payment suppport: Authorize.net

[rajeev-k-tomy]

Form KonstantinAnthony in Hyvä slack:

Authorize.net has Accept.js API so it should be relatively painless like Stripe.
https://developer.authorize.net/api/reference/features/acceptjs.html

[EmperorKonstantin]

This one would most definitely be a major one for us. Thanks @rajeev-k-tomy !