Business justification

Embedded development is a key segment for TQC business. We need to ensure that the designers have good understanding of the e2e steps required to be able to live preview their designs on actual embedded devices.

Implementation needs

Existing documentation: https://doc-snapshots.qt.io/qtdesignstudio/studio-preview-on-devices.html is wrong because it talks about compiling application to the target device instead of using the Live preview. Documentation is missing:

1. the bits explaining what needs to be done to the embedded device so that a designer can configure it to her Design Studio. This has in fact two subcategories:
   1. Devices is a reference hardware when a B2Qt image flashed on a device is enough
   2. Device is a custom or it has custom image, and when the developer prepping the device needs to know what specific libraries and features needs to be enabled on the device (assume QDB target bits?)
2. How to configure the device in to the Design Studio
   1. Over USB (most targets)
   2. Over TCP/IP (e.g. Raspberry Pi 3B that does not support USB)
3. How to verify and configure the resolution and DPI and color depth and other key aspect in to the Design Studio project
4. Are there host specific limitations and what (Mac host not working yet, waiting QTBUG-75657)