New SDK feature: Setup system-wide web and socks proxy parameters

[amircybersec]

I introduced a new feature which just merged into the main branch of the SDK (PR #190).

Now you can write desktop proxy apps that tunnel all web traffic, in particular, web browser traffic on Windows, MacOS, and Linux through a local or remote HTTP or SOCKS proxy.

All you need to do is import sysproxy package and call following methods to setup or disable the proxy.

For web proxy:

SetWebProxy(host, port)
DisableWebProxy()

For socks proxy:

SetSOCKSProxy(host, port)
DisableSOCKSProxy()