Typing Examples Please

While taking on some "good first issues" the typing issues always seem to popup. Wthout a good prior knowledge of Python types and custom Circuit Python types such as `i2c: busio.I2C` it's actually much harder than expected. A place that lists most if not all the different types that can be used and examples of their syntax usage would be greatly appreciated. Having that live inside the typing repo as an example or multiple examples seems the most logical place.

Tekktrik suggested making this an issue and volunteered as tribute to do it.