Speculos with HID + BUSB

[rithvikvibhu]

With busb removed, it's no longer possible to use the emulator. Would be nice if it's added back, but not a high priority as it only helps a few people without devices and during dev.

[nodech]

I believe we can include both for the hsd-ledger library, probably as optional dependencies. (E.g. WebUSB can only be supported by busb)

This is the current situation of the supported platforms

	Linux	MacOS	Windows	WebUSB	Speculos
HID	+	+	+	-	-
BUSB	+	+	-*	+	+

• BUSB (node-usb) - needs drivers for windows

Only thing that needs slight adjustments is API compatibility, after compatibilities are fixed it should be possible to do optional thing.

[pinheadmz]

We could add the speculos feature on top of HID as well, the way it worked with busb is just by changing the require() statement. So the speculos.js module might just need to be tweaked a bit to match the HID API, which isn't too different from the busb API anyway.

[nodech]

I have not looked into speculos much, but I believe we could even move that out of busb and make separate device, like busb and hid. This could also allow us to run tests for lower layer easier (apdu/an inner workings). - If it can be compiled on CI even better.