marlinfirmware/marlin ? reverse-engineered prompt

Build me a clean, working setup for Marlin 3D printer firmware that I can use for a real printer.

I want the project to compile and be ready to customize for a specific machine, with the usual settings exposed in a way that makes sense for someone configuring a printer for the first time. Please make sure it works for both common 8 bit and 32 bit boards, and keep the code and config organized so it is easy to update later. If you need to check the latest build or configuration guidance, look up the current docs online.

I also want the basic docs to be clear about how to choose the right configuration, build the firmware, and upload it to the printer board. If there are example configs or recommended defaults, wire those in so the project feels usable right away, not like a blank starter template.