docs: add WSL2 + Docker Desktop setup guide for running KubeEdge on Windows

[Gurkaran18]

What type of PR is this?
/kind documentation

What this PR does / why we need it:

I went through the issue carefully and noticed that there's currently no
documentation for setting up KubeEdge on Windows using WSL2 + Docker Desktop,
which is a really common environment for students and developers who don't have
a dedicated Linux machine.

This PR adds a new guide at docs/setup/wsl2-docker-desktop.md that covers
all six undocumented failure points mentioned in the issue:

1. Enabling systemd in WSL2 (it's not on by default)
2. Installing native containerd inside WSL2 (Docker Desktop's containerd
   is not accessible from within WSL2 at the expected socket path)
3. Fixing the cgroupDriver mismatch (WSL2 uses cgroupv2 but edgecore
   defaults to cgroupfs)
4. Disabling swap validation (WSL2 has swap enabled which blocks edgecore)
5. Installing CNI plugins manually (not covered in the quickstart)
6. Installing iptables (not pre-installed on WSL2 Ubuntu, causes pods to
   get stuck in ContainerCreating silently)

Each step includes the exact commands to run and also explains what symptom
you'll see if you skip that step, so it's useful both for initial setup and
for debugging.

I also added a Chinese locale mirror file under i18n/zh/ to make sure the
Docusaurus build doesn't fail.

Which issue(s) this PR fixes:
Fixes #797

Special notes for reviewer:
Only 2 new files added, no existing files modified. All commands were taken
directly from the verified steps documented in the original issue report.

Does this PR introduce a user-facing change?:
Yes — adds a new setup guide for Windows developers using WSL2 + Docker Desktop.

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[gemini-code-assist]

Code Review

This pull request introduces a new documentation guide for running KubeEdge on Windows using WSL2 and Docker Desktop, including both English and Chinese versions. The guide outlines essential configuration steps such as enabling systemd, installing containerd, and configuring CNI plugins. The review feedback suggests improving maintainability by using variables for the CNI plugin version instead of hardcoding it in both the English and Chinese documentation files.

[Gurkaran18]

Hi maintainers! I investigated the Netlify build failure and wanted to clarify:

The 4 failing Netlify checks are caused by pre-existing broken links in i18n/zh/...advanced/cloudcore-logs.md (missing zh mirrors for debug.md, install-with-keadm.md, config.md, and faq/setup.md). These broken links exist on master and are not introduced by this PR.

The WSL2 guide files added in this PR are clean — I confirmed by running a local yarn build with only the cloudcore-logs errors appearing (same as master baseline).

Would it be okay to proceed with merging, or would you like me to fix the pre-existing cloudcore-logs broken links in a separate PR?

[fujitatomoya]

i am not necessarily against this documentation. but i would suggest to move this doc under https://github.com/kubeedge/website/tree/master/blog at this moment, instead of official documentation setup procedure with a couple of reasons.

• for real situation, it is highly likely that business developers use linux based platform instead of windows WSL environment.
• without having the CI/CD pipleline for WSL, it is so easy to break and generate the gap between official documentation and what user can do. especially on this point, i would recommend to move this doc under blog as community support section.