Let's translate AppImageLauncher!

In order to provide a more seamless experience for users, AppImageLauncher should be translated!

I will set up a Weblate integration as soon as possible, and would like to see as many users speaking different languages as possible to translate AppImageLauncher's user interface and desktop action titles into many different languages.

I will post a link to the translation portal here as soon as it's available. I will start myself with a German translation of the English text.