Windows Backend installation docs need to mention re-launching the CLI

[sethkaz]

Prerequisites

• I have read FAQ
• I have searched existing issues (including closed ones)
• I use KiKit at least version 1.6.0 (older version are not supported)

KiKit version

1.6.0

KiCAD version

8.0.4

Operating system

Windows 10

Description

When installing the kikit backend on Windows via the instruction, the kikit --version doesn't work immediately. It looks like I needed to relaunch the KiCAD CLI, and it then started working.

(I'll try to update the docs and put in a PR, but I wanted to capture it here before I forget.)

Steps to Reproduce

Install the backend per the instructions and keep the CLI open when trying to test it.

[ckuhlmann]

Another thing that should be added:
I had to run

cd "C:\Program Files\KiCad\8.0\bin"
"C:\Program Files\KiCad\8.0\bin\python.exe" -m pip install kikit

to install KiKit, since otherwise I would get a "kicad AssertionError: SRE module mismatch" error because some files would be picked up from my Python installation outside of KiCad.

I also had to run

SET HTTP_PROXY=http://webproxy.mycompany.com:8080
SET HTTPS_PROXY=http://webproxy.mycompany.com:8080

in the KiCad Command prompt prior to installing KiKit with pip, since I'm behind a proxy and pip will not use/detect it by default.