WebApp builds installable image for device to run TinyML

[doyu]

The parent issue #46 User stories https://miro.com/app/board/uXjVPwQdIjc=/

Acceptance criteria (Acceptance test in RF)

• Submit a failing AT first
• A generate button in Installing tab should generate an installable OS image for a selected device.
• A installing button in Installing tab should install a new installable OS image (FOTA).
• In Sprint4, we assume, a device is connected to PC via USB or BT.
• In Sprint4, we assume, TinyMLaaS is running on PC.

[ArttuLe]

Installation of the image is done via usb, until CI/CD is working.