Depends on D12679, D12680.

CHANGELOG available here.

This is also a refactoring of the package (particularly separating proton-python-client and protonvpn-nm-lib) so that it will be easier to manage the dependencies since the inclusion of protonvpn-gui (T9924).

Connected to various locations in the world, checked IP addresses and ran speed tests.

Signed-off-by: Gavin Zhao <git@gzgz.dev>