Configfile: add option to set imported tag names

[lukas-rotsching]

User story

1. As a user
2. I want a config file option to control which tag names are imported
3. So that i have finer control over what data i have in my OS node

Acceptance criteria

• Add a config file option to set the tag names that are to be imported
• (optional) reserve a special value for this option that means 'all the tag names that all files have in common'
• Make the option default to either 'all' or the optional value

Definition of done (DoD)

A feature is considered complete when

• All of its acceptance criteria have been met.
• It has been thoroughly tested.
• The code has been peer reviewed by the dedicated team.
• It can be seamlessly integrated into the main branch without causing any negative side effects.
• Its core functionality has been thoroughly documented.

DoD general criteria

• Feature has been fully implemented
• Feature has been merged into the mainline
• All acceptance criteria were met
• Product owner approved features
• All tests are passing
• Developers agreed to release