Experimental Release testing if now Friends are able to join #bugfixed

#bugfixed issue with adding your friends to the blocking rule.

You start in your own online lobby alone.
Plese test if you can play with your friends and get back to me via commenting on this Issue: #9
If this doesn't work we can try actively monitoring to whom you try to connect via the blacklisted UDP ports and then add them to the scope if they are not any of your friends. But this requires you to keep the program running while playing.

Console Menu added

I did add a console menu so you can add/remove the firewall rules at your leasure.

New Win Builds and Net 5.0 upgrade

Create LICENSE
autopackage and upgrade to .net 5.0
Update README.md (preview img + buildstatus)
created automated workflow for builds
workflow upload msix, x86 bin, x64 bin artifacts

Initial Release

It seems to do what it should.