Add Cloudlog to heimdall

[resnikov]

I use heimdall as a dashboard and think it would be good to get Cloudlog added to it.

Happy to submit it but did not want to do it without asking first as it needs the logo.

https://github.com/linuxserver/Heimdall-Apps

[magicbug]

We dont have much of a real icon you'll find one at https://raw.githubusercontent.com/magicbug/Cloudlog/master/favicon.ico but feel free to see if they will add it.