Add a first-boot wizard to set localization settings

[ethanjli]

Is your feature request related to a problem? Please describe.
Currently, the wifi regulatory region for hostapd and wpa_supplicant on the PlanktoScope software distro are hard-coded as US. Additionally, the language used for the machine name is hard-coded as en_US.UTF-8 (based on the base OS's localization settings). The same thing is true of terminal keyboard settings and terminal language in the Debian configurations.

Describe the solution you'd like
It would be great if we had a first-boot wizard in device-portal to set the wifi regulatory region, as well as the language to use for the machine name. The first-boot wizard could check for the presence of a file which indicates that it has been run already.

Describe alternatives you've considered
The first-boot wizard could also be part of a separate control panel app for the PlanktoScope. There absolutely should be a way to change the localization settings after first boot.