Add a configuration panel to adjust Wi-Fi configurations

[ethanjli]

Is your feature request related to a problem? Please describe.
Currently, functionality related to managing Wi-Fi network connections and Wi-Fi hotspot mode are all implemented in the Node-RED dashboard. However, the Node-RED dashboard is difficult to maintain in a collaborative project. It would be great if we could move wi-fi management functionality out of the Node-RED dashboard.

Additionally, the Node-RED dashboard is buggy - when attempting to add a wifi network without a password, it inserts an error message into the wpa_supplicant.conf file.

Additionally, Fabien Lombard has requested a way to toggle whether the PlanktoScope generates a wifi hotspot network; this would be useful for security reasons, and to clear up the wifi channels for other PlanktoScopes. Fabien has also requested a way to remove a wifi network from the wpa_supplicant configuration.

Describe the solution you'd like
We should provide a simple control panel GUI for managing everything related to wi-fi, ethernet, and internet sharing. In the future, we could also use this to toggle the functionalities for a wlan1 wifi USB dongle and/or an eth1 USB-to-Ethernet adapter, etc.

Describe alternatives you've considered
These functionalities could also be implemented in a separate control panel app, if that would make more sense.