VPN provider update: ProtonVPN Server List Update

[virtitnerd]

The current server list for ProtonVPN is missing a large amount of Server's currently available to users. API is public to view current server listing with country, location, domain, load, etc.

ProtonVPN API : https://api.protonmail.ch/vpn/logicals

When ProtonVPN is selected, could it be configured to use the api then to select the best server based on the load if we specify the SERVER_COUNTRIES and SERVER_CITIES variables?

[github-actions]

@qdm12 is more or less the only maintainer of this project and works on it in his free time.
Please:

• do not ask for updates, be patient
• 👍 the issue to show your support instead of commenting
  @qdm12 usually checks issues at least once a week, if this is a new urgent bug,
  revert to an older tagged container image