Collin8000/Thinkpad-T14-Gen-1-Amd-Hackintosh — reverse-engineered prompt

Build me a clean Hackintosh setup and guide for a ThinkPad T14 Gen 1 AMD with a Ryzen 7 Pro 4750U, Vega 7 graphics, Intel AX200, ALC257 audio, and RTL811 ethernet, using OpenCore.

I want it focused on Sonoma first, with Monterey support too. Please include a ready to use EFI, a simple step by step README, the exact BIOS settings I should change, and post install tips like raising iGPU memory and setting up YogaSMC. Make it clear what should work for normal use, like wifi, bluetooth, battery, camera, backlight, fan control, trackpad, graphics, and dual boot with Windows. Also be honest about the known issues, especially Airdrop, screen mirroring, brightness control, and possible trackpad differences if someone has a glass replacement.

Please make the repo easy for a normal person to follow, and use the images for helpful examples where it makes sense. You can look up current docs online if you need to.