Draconghost/Unreal-Engine ? reverse-engineered prompt

Build me a working Unreal Engine 4.22 source checkout that I can open and run as the editor on my machine.

I want the repo set up so I can follow the normal install and build flow, download whatever extra files are needed, generate the project files, and compile the editor successfully. Please make sure it’s ready for the main desktop platforms mentioned in the readme, especially Windows, and keep the setup simple enough that I can just clone it, run the scripts, and launch the editor.

If anything is missing or unclear, look up the current docs online and fill in the gaps. I’d also like the result to include a clear way to build the engine and any basic notes I’d need to get started without guessing.