Move typing annotation definitions to `circuitpython_typing`

[tekktrik]

This library may improve from having some of the type annotations reworked and checked, as well as moved to circuitpython_typing. This might improve readability of the library.

[dhalbert]

I have a branch where I started to do this: main...dhalbert:Adafruit_CircuitPython_Requests:change-exceptions

[justmobilize]

@dhalbert can this be closed? The typing is in adafruit_typing and I removed it from here, and then connection_manager once I saw it in the typing lib

[dhalbert]

Fixed by adafruit/Adafruit_CircuitPython_Typing#35, I think.