feat: add vpn start progress #114
                
     Merged
            
            
          
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Download progress will be constrained from 0% to 90%, and the final 10% is for the binary to start. There's not much else that happens on Windows during startup so those are the only events I added.
If the binary is already downloaded, the progress ring will animate smoothly from 0 to 90.
If the newer app is used with an older service, the ring will just show indeterminate progress like it used to do.
Spotify_swiIPScTar.mp4
Closes #100