docs: Add documentation to site for installing Envoy on Windows

*Description*:
The Envoy site documentation should include instructions/examples for installing on Windows.

*Relevant Links*:
- See: https://www.envoyproxy.io/docs/envoy/latest/start/install#
- Child issue of: https://github.com/envoyproxy/envoy/issues/13190