Fix Friend → Omi rename

[raviriley]

I'm at the Berkley x Omi hackathon at Arcadia, and when I was setting up the device I saw the onboarding screens had naming inconsistencies, so this is my first contribution haha

Changed Friend → Omi on the docs and app files

[olegv101]

this is good

[josancamon19]

Device is named Friend, Omi is the app name, yea bad naming, but it is. Also, don't do a replace all everywhere, not sure if smth breaks.

[raviriley]

@josancamon19 didn't do a find and replace everywhere! I didn't realize the naming distinction, however. Happy to close if this is useless haha