[Docs] Add Windows + Docker installation guide for OpenROAD flow

[agarwaldisha7616]

Description

--- Problem:
The current documentation does not cover installation for Windows users.
Windows users have to use Docker to run OpenROAD, but there is no
step-by-step guide for this setup.

--- What I faced:
While installing OpenROAD on Windows using Docker, I encountered several
undocumented issues:

• Copying .deb file from Windows into Docker container
• Version mismatch between yosys (apt) and OpenROAD-flow-scripts
• OSS CAD Suite required for modern yosys (>= 0.58)
• Environment variables reset on every session
• DEBIAN_FRONTEND=noninteractive needed to avoid timezone prompt

--- Proposed Solution:
Add a Windows + Docker installation guide to the docs covering:

• Docker setup on Windows
• Copying prebuilt binary into container
• Installing correct yosys via OSS CAD Suite
• Running nangate45/gcd example successfully

--- My Setup

• Windows 11
• Docker Desktop
• Ubuntu 22.04 container
• OpenROAD 26Q1

[maliberty]

@luarss sounds like a good issue for the onboarding GSoC.

Note you can also use WSL on windows and follow linux instructions.

[Divinesoumyadip]

@luarss sounds like a good issue for the onboarding GSoC.

Note you can also use WSL on windows and follow linux instructions.

Fixed #4031

Thanks @maliberty

[maliberty]

There are dueling PRs for this issue. Please work to consolidate to one.

[Divinesoumyadip]

There are dueling PRs for this issue. Please work to consolidate to one.

Will fix it today

[agarwaldisha7616]

Hi @vishuverma-1
Thanks for offering to help! I'm currently actively working on consolidating the Windows + Docker installation guide for this issue. I've already made progress

I aim to have the updated PR ready by today