Configuring MX Ergo S

[JoelYoung01]

I didn't see anything in this repo about the MX Ergo S specifically (saw mx ergo, assuming that is different)

I spent a bit of time poking at the codes available and have a button mapping table in case anyone was wondering which buttons map to what CIDs.

CID	Key Name	reprog?	fn key?	mouse key?	gesture support?
0x50	Left Click			YES
0x51	Right Click			YES
0x52	Middle Click	YES		YES	YES
0x53	Back	YES		YES	YES
0x56	Forward	YES		YES	YES
0x5b	Middle-Left	YES		YES	YES
0x5d	Middle-Right	YES		YES	YES
0xd7	?	YES			YES
0xfd	Thumb Btn	YES		YES	YES

Not sure what 0xd7 is, guessing it's the device quick switch, but I'm assuming as soon as the btn is pressed it switches so the key is never really sent to the receiver.