[Feature request] More settings import customizations

[harmonira]

Checklist

• I have searched for existing issues (open and closed) and confirmed this feature hasn't been requested before
• I believe this feature request will benefit more than 10% of users, not just myself

Feature Description

I propose that there should be a setting to pick from a list of database data that you can choose to import when you import the database. One to add to history instead of overwrite it would be one of them. This would make it so that people could add their newpipe history to pipepipe without erasing the pipepipe history, choose which settings to keep and which to not, etc. Perhaps also a feature to choose which database data gets exported too.