Adds Mac GUI

[qarmin]

Fixes #11
Fixes #64

Thanks to ImplicitEmpiricism I have now basic instructions how to compile Czkawka on MacOS.

xcode-select --install
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
brew install rust gtk+3 
curl -L https://github.com/qarmin/czkawka/archive/2.0.0.tar.gz | tar -zxvf -
cd czkawka-2.0.0
cargo run --bin czkawka_gui

Let's see if I can wrap it inside Github CI

Test binary - czkawka_gui-macOS-stable.zip

It should be able to run with help of terminal.
Probably after some changes it will be able to run when double clicking at it.

If you could open app, then please print here screenshot with OS info,

[magnusviri]

I'm not sure if you still want screenshots. I'm on 10.14.6.

[qarmin]

Thanks,
Looks that all icons are missing.
Could you install an icon pack to see if it will restore the icons?

brew install adwaita-icon-theme

[magnusviri]

I did that and there's no change.

[renarsvilnis]

Want to add to @magnusviri, icons also missing for me. macOS Big Sur 11.3

[kytta]

Weirdly enough, installing adwaita-icon-theme resolved the issue for me (as mentioned in #368). I'm running macOS 10.15.7