Import bills from part providers

[Tropaion]

Is your feature request related to a problem? Please describe. A feature to import parts of an part provider by the bill. You can, for example, export the mouser bill as an excel file. It would be really nice if you can import this, so that the database gets updated with these parts.

Describe the solution you'd like A clear and concise description of what you want to happen.

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Add any other context or screenshots about the feature request here.

[devstuff]

+1