darthcloud/BlueRetro — reverse-engineered prompt

I want a working fork of BlueRetro that I can flash onto an ESP32 and use as a Bluetooth controller adapter for retro consoles and older computers. Keep the core idea the same, let modern Bluetooth controllers like Wii, Switch, PlayStation, Xbox, and generic HID pads connect and work on the supported systems, including things like NES, SNES, Genesis, Saturn, PS1, N64, Dreamcast, PS2, GameCube, and similar platforms. It should handle multiplayer on one adapter where the project already supports that.

Please get the firmware into a clean, buildable state, make sure the main configs make sense, and include simple instructions for building, flashing, pairing controllers, and testing on real hardware. Since the original project is archived, treat this like a practical community fork, fix obvious issues that stop it from compiling or being usable, but do not invent big new features. Use the existing repo and wiki as the source of truth, and look up current docs online if you need to.