Added app icons and .DS_store to git ignore for future mac contributors

[Wmitrut]

• Added app icons on img directory in some extension formats (svg included if the generated icon will sometime be needed)

• .DS_store to git ignore for future mac contributors because that was missing

[anapaulagomes]

You've done a great work here @Wmitrut! If you don't mind, I'd like to ask you a few things:

• Could you delete our temporary icon please?
• Could you also generate an icns icon? This is used for MacOS versions.
• Last thing (I hope 😂): could you replace this line here for this one:
  "build": "electron-packager . pardal --platform=darwin,win32,linux --icon=app/img/icon",. It will use the current directory and assign the right icons to each platform.

Many thanks!

[Wmitrut]

Yeah!, I`ll do that!

[Wmitrut]

Done

[anapaulagomes]

My fault: one more thing is missing and it will break stuff if we merge it: const tray = new Tray(${__dirname}/app/img/temp.png);. We just need to replace by icon.png. 🙏 @Wmitrut

I must say: the new icon is dope!

[Wmitrut]

Easy peasy lemon squeezy - it`s done

[anapaulagomes]

Thanks a lot! 🎉