Exciting! Tried this locally with an iOS app in my dock and the CLI responded gracefully with " icon not found."

I'm out for the rest of the day, but I'll check in on this PR again tomorrow. Happy to work to get a good solution going together for the icon workflow for Catalyst apps to address the caveats in your PR description.

Hey @jeremysarchet,

Just wanted to share something I found. The caveat # 2 of converting the square to apple's "squircle" icon can be solved in 2 ways that I could find:

1. Apply the mask on the server side after the image uploads. That way, users don't have to install any image library to mask the image.
2. Keep the icons square and apply the mask in the front end, like how Apple does it on the AppStore website. This article will be helpful: https://blog.jim-nielsen.com/2017/creating-ios-icon-masks-in-the-browser/. This approach was very easy to prototype, so I tried it out and it turned out nice. :)

Current:

With the Mask on the front end:

Hey @raxityo. Ooh, very nice, thanks for the research and suggestions. I do like option number 2 quite a bit. Funnily enough, I was referencing that very article about two years ago at my previous job when we wanted to make our web app use all squircles instead of roundrects. It's a great article.

I'm out of time for this week, but your screenshots are appealing. I'll help to make this happen next week.