The company isn't for sale, it's assets are. That'll be anything they have in the factory, supply contracts with still outstanding deliveries that are already paid for, the brand itself, patents, IP, etc ...
The company is done, it's gone, a revival of Energica would be more like Triumph. Triumph isn't Triumph, some guy bought the brand and IP and set up a fresh new company around it. This does mean that if someone with a real interest in making bikes were able to snap up enough of the liquidation we could see a revival via a whole new company without all the debts Energica will have racked up but there's a reason you don't see that happening all the time, it is *not* cheap to do.
As for releasing source code and stuff like that, sorry but that all falls under IP. Energica will have spend a lot of time working on that software, tweaking it, building up institutional knowledge of how electric motorbikes perform and what they need and that will all be baked into the software and described in their internal documentation. That stuff is probably the most valuable part of Energica since I expect you can't get it by just hiring in some car guys.