Support for ColecoVision and Atari 2600

[palmenros]

Is your feature request related to a problem? Please describe.

There are some old-school consoles missing. Concretely Atari 2600 and ColecoVision.

Describe the solution you'd like

To add support for those consoles in the theme.

Describe alternatives you've considered

I've tried to see if I could add the consoles myself, but some artwork has overlays, and I don't know how to make them consistent.

Additional context

All the necessary images (background photo, controller photos, etc) can be found on https://www.screenscraper.fr/ for both Atari 2600 and ColecoVision, so the only remaining thing to do is to impose the overlay over the background photos there.