Add icons for Komoju payment processor (#1112)

* Add icons for Komoju payment processor

Komoju is a large payment processor for handling many international payment types. I've just signed up with them for my business and they have 2FA.

Icons made using an SVG from their site, the dark version was done by changing svg source code colour for the upright.

* Rename komoju _dark.png to komoju_dark.png