Can you add Cheogram logo icon?

[Neustradamus]

• https://git.singpolyma.net/cheogram-android/tree/master/item/art/ic_launcher.svg
• https://git.singpolyma.net/cheogram-android/blob/master/art/ic_launcher.svg
• https://cheogram.com/

[Neustradamus]

Thanks @Ri0n!

Commit:

• https://github.com/psi-im/psi/commit/c105f1b6b6214224c03bf904cba7c95b5acc4a92