prismlauncher/PrismLauncher — reverse-engineered prompt

I want a polished desktop launcher for Minecraft, basically in the spirit of Prism Launcher. The main goal is to let people manage multiple separate Minecraft installs at the same time, so different game versions, modded setups, and personal profiles do not interfere with each other. It should be easy to create, edit, duplicate, organize, and launch instances, and the whole thing should feel friendly for regular players, not just advanced users.

Please make it work on Linux, Windows, and macOS, with clear Prism Launcher branding and no confusion with MultiMC. Support common modded setups like Fabric, Forge, and Quilt where that already fits the project, and keep the interface clean, fast, and reliable. I also want straightforward build and run instructions so someone can compile it from source without too much hassle. If you need details, look up the current Prism Launcher docs online and match the behavior people would expect from the real app.