Option to Connect to Fastest Plus Server

[jcemerson]

The determination of which server is the "fastest" server is more complex than just the server's load; it involves other factors such as distance of the user from the server, etc. The ProtonVPN API provides data to indicate the fastest server for a particular user (using their own algorithmic magic) and ProtonVPN-CLI just connects to that fastest server.

However, for Plus and Visionary customers, it's not uncommon to find that the fastest server you've connected to is a Basic-tier server, which don't offer all the features of those higher-tier plans.

An option should be added (likely as a Profile and could be assigned to the Quick Connect button) to allow Plus and Visionary users to specifically connect to the fastest Plus server, either out of all server or for a specific country.