"fresh" task option

[arcticicestudio]

Implement a fresh options for all core plugins that can be used to inidicate that the associated item should only be handled when the --fresh CLI option is set.
The default behaviour should be to handle all items if the fresh option is not set.

Use cases
Run specific task commands only one time on a fresh system like for example a shell script that install packages via a package manager like pacman. This should not run each time the dotfiles are bootstraped to e.g. clean broken links or add new ones.