Draft: Add include dialog

Checklist

• Add entry to the CHANGELOG.md for non-trivial changes

State

I think this is bad for several reasons:

• People would expect to be able to exclude folders by deselecting them. Currently not possible
• People are mostly not aware that they often want ~/.config and ~/.var/app for things like keyring or Flatpak app data

I think the best way is to include Home and exclude some things from it.