Atmosphere-NX/Atmosphere ? reverse-engineered prompt

I want to build a working version of Atmosphère, a custom firmware project for the Nintendo Switch.

Please set up the code so it’s organized around the main pieces described in the README, with a loader that starts the boot process, a secure monitor component, emuNAND support, custom system modules, and OS patches for Horizon. Make it feel like a real firmware project that can be built from source, with clear separation between the parts and sensible defaults in the templates and build files.

If anything needs current reference docs or upstream details to get the behavior right, look them up online and use the repo’s existing structure as the guide. I mainly want a clean, buildable codebase that matches the project description, with the core flow wired together and enough documentation or comments that another person could understand how the pieces fit.