Add export car feature

[Gaspartame]

The possibility to import data about a car from other apps is very nice, but importing from the same app on another phone would be nice too. I guess what's missing is a way to export to a file that can be imported on the other way.

[Gaspartame]

Actually, copy-pasting via sftp old_phone/home/defaultuser/.local/share/harbour-carbudget/harbour-carbudget/car.cbg to new_phone/home/defaultuser/.local/share/harbour-carbudget/harbour-carbudget/ was quite easy, but maybe not the most user friendly option

[joonne]

I'm keeping backups that way of apps in dropbox, I guess many others also 😁

[direc85]

The basic backup/restore functionality already exists:

• Backup: Select another car >> long-press on the vehicle -> Backup
• Restore: Select another car >> Import >> pick the file

For exporting, the data file is a plain SQLite database, so you could export it, install e.g. DBeaver and just open the file. That's not really an user-friendly option, so a better export (CSV? Excel?) would indeed be welcome.