Add USB host tutorial (#12)

* usb-tutorial-draft (#10)

* Created new tutorial

* Updated content.md file

* Update content.md

* Update content.md

Co-authored-by: Lenard George Swamy <lenardgeorge92@gmail.com>

* Update content.md

* Update content.md

* Add a line

* Tutorial update

Added first 3 steps of the tutorial

* Step-by-step and troubleshooting

* style fixes

* text fixes

* Update content.md

* text fixes

* Update content.md

* Update content.md

* Update content/tutorials/portenta-h7/por-ard-usb/content.md

Co-authored-by: Sebastian <s.hunkeler@arduino.cc>

* Update content/tutorials/portenta-h7/por-ard-usb/content.md

Co-authored-by: Sebastian <s.hunkeler@arduino.cc>

* Update content/tutorials/portenta-h7/por-ard-usb/content.md

Co-authored-by: Sebastian <s.hunkeler@arduino.cc>

* Update content/tutorials/portenta-h7/por-ard-usb/content.md

Co-authored-by: Sebastian <s.hunkeler@arduino.cc>

* Update content/tutorials/portenta-h7/por-ard-usb/content.md

Co-authored-by: Sebastian <s.hunkeler@arduino.cc>

* Update content/tutorials/portenta-h7/por-ard-usb/content.md

Co-authored-by: Sebastian <s.hunkeler@arduino.cc>

* Update content/tutorials/portenta-h7/por-ard-usb/content.md

Co-authored-by: Sebastian <s.hunkeler@arduino.cc>

* Update content.md

* Update content.md

* Update content/tutorials/portenta-h7/por-ard-usb/content.md

Co-authored-by: Sebastian <s.hunkeler@arduino.cc>

Co-authored-by: i-herrera <57756811+i-herrera@users.noreply.github.com>
Co-authored-by: Lenard George Swamy <lenardgeorge92@gmail.com>
Co-authored-by: GDJose <jose.gdotel@gmail.com>

Author: 4 people