refactor: Drop dependency on fact_helper_file

[maringuu]

This uses https://github.com/maringuu/fact-mime-database which is imo the only relevant thing that fact_helper_file provides.

Before merging we should somehow incoperate that fact_helper_file/mime/custom_mime_internal is missing.
If would be great if we could add this somehow add to the FACT_core repo to make fact-mime-database not use its generality.

[maringuu]

While I don't really care note that the repo is in my namespace and not fkiecad's.

[maringuu]

This is blocked on ahupp/python-magic#304 which allows us to delete helperFunctions/magic.py completely.
Edit: To actually get rid of it we also need to solve ahupp/python-magic#305

[maringuu]

Seems that I and the python-magic developer disagree on what a good public API for the magic module would be.
I updated our magic wrapper to be what I wanted in pymagic's API.

Regarding the FACT extractor I don't think we need to copy this code since the only thing it ever needs is Magic.from_file(path, mime=true).
So it could just provide a global instance of magic.Magic and everything works as expected. If we even used the MAGIC environment variable to specify where the additonal magic database is, we can just use magic.from_file instead of creating an instance of Magic.

[maringuu]

Assuming that fkie-cad/fact_extractor#128 works and is merged this is ready for review.