Adds wgbooster.dll exported interface

[wiresock]

Hi! Thank you for your interest in Wiresock. I wanted to suggest that your application may be more efficient if you call the wgbooster.dll directly instead of starting the wiresock-vpn-client application. This would allow you to integrate the VPN functionality more closely with your application, potentially improving performance and giving you more control over the VPN connection.

I have not had a chance to test the C# file that is proposed in this PR, but if you encounter any issues, I would be happy to help you resolve them.