Feature/logos

[d-rk]

Hey,

this is the final thing I modified and wanted to contribute back.
I added logos for all the engines:

[jwpjrdev]

Lingo is https://lingoapp.com, not Duolingo

[d-rk]

@jwpjrdev thank you for the hint. I updated the logo

[artnc]

Wow! I'm curious, where did you get the images from? One reason why I hadn't done this being that I was never sure about committing to also providing images for all new engines going forward

[d-rk]

@artnc actually that was quite cumbersome 🙈 I first just added it for the services we are using internally. But for this PR I had to find all logos, which took some time. I mainly checked the brand/marketing pages of the companies for the logos. But for some of them I had to grab them elsewhere.

I think going forward this shouldn't be a problem, because for a new engine that needs to be added only a single logo has to be found.