Migrate StUsb4500 from .NET IoT to .NET nanoFramework

[Ellerbach]

Details about Problem

nanoFramework area: C# code

Description

In the list of bindings to migrate from .NET IoT to .NET nanoFramework, few bindings are still to migrate.

You can find all of them in this directory. The goal is to migrate them to .NET nanoFramework using the documentation and guidelines here.

Detailed repro steps so we can see the same problem

1. Pick StUsb4500
2. Copy/Paste the directory into /devices
3. Adjust the code to make it .NET nanoFramework compatible
4. Adjust the samples
5. Adjust the nuspec
6. Adjust anything specific in the documentation (replace Raspberry Pi Fritzing by one of the supported MCU like ESP32, add the specific warning about I2C and SPI pin setup, etc)
7. Go for a PR!

Other suggested things

Use the other existing binding as an examples.

Additional context

This is part of a long term effort that relays on aligned API between .NET IoT and .NET nanoFramework.