Automatically detect proxy settings in windows

[brian-mann]

Problem

Windows users typically have their proxy settings configured at the system level, in the Windows registry. Specifically at HKCU:Software\Microsoft\Windows\CurrentVersion\Internet Settings.

We should read proxy settings in from the Windows registry for a couple of reasons:

1. Users are used to desktop apps which can use the system-wide proxy automatically
2. It's the only way to enable users of the standalone binary who need Internet access to get it.

Solution

Read in the user's proxy settings from the registry using the @cypress/get-windows-proxy module, which uses the native @cypress/registry-js module to read in the actual settings.

[brian-mann]

Fixed by #3531

[cypress-bot]

Released in 3.3.0.