Checking unreferenced assets/qml files

• Scan for assets/images in the project that are not referenced. And warn about those.
• Scan for QML file screens in the project that are not referenced from the main.qml project and therefore "never executed". And warn about those.

Especially when exporting from Figma, you can have dead "screens," once users refactor/rework the project, they are also likely to get dead assets. The price is usually high on MCUs, and having an automated mechanism to spot those would be very useful.

When to do this?
Startup?
Project load?

Split Button could have options?

There is UX work related to this.