Add BlueRetro X BT Adapter

[darthcloud]

PID request for BlueRetro Xbox adapter.

[Spritetm]

Can you also add the answers to the questions in the readme.md please?

[darthcloud]

Sorry I forgot.

A short description of what the device is going to do (e.g. cat tracker with USB trace download)
It's a Bluetooth controller adapter for the Original Xbox console.

What chip are you using for the device the PID is allocated for (e.g. ESP32-S2)
ESP32-S2

Why you need a custom PID (and can't, for instance, use the default TinyUSB PIDs)
It's a custom USB device that needs to be uniquely identified. None of TinyUSB class are used.

If you're requesting a PID on behalf of a company, please mention the name of the company
BlueRetro

If applicable/available, a website or other URL with information about your product or company
github.com/darthcloud/blueretro

[Spritetm]

Great, looks good. Thanks, I'll merge.