HMCL-dev/HMCL ? reverse-engineered prompt

Build me a cross platform Minecraft launcher called HMCL that feels polished and easy to use.

I want it to let people sign in, manage game versions, install common mod loaders like Forge, Fabric, NeoForge, Quilt, and OptiFine, and create or import modpacks. It should also handle basic game customization and let users tweak the launcher look and feel. Make it run on Windows, Linux, macOS, and other supported systems without feeling clunky.

Please keep the interface clean and modern, and make sure the app can handle downloading, updating, and launching Minecraft smoothly. If you need to check current docs or best practices for any part of the build, go ahead and look them up. I mostly want a working launcher with the main user features in place, not a perfect enterprise app.