Clarify Windows WSL installation notes

[Gujiassh]

Summary

• explain how to install Lightpanda via WSL using the Linux steps
• recommend installing automation clients like Puppeteer on the Windows host for CDP control

Testing

• not run (docs only)

[github-actions]

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[Gujiassh]

I have read the CLA Document and I hereby sign the CLA

[krichprollsch]

I would keep the same formatting as Linux and macOS

[Gujiassh]

Updated the Windows install section to match the existing Linux/macOS formatting.

[cdebled]

Suggested change

	Lightpanda runs inside WSL when invoked from a WSL shell; follow the Linux install steps above in that environment.
	Install automation clients such as Puppeteer or Playwright on the Windows host so they can drive Lightpanda through CDP over the mapped ports.
	Lightpanda has no native Windows binary. Install it inside WSL following the Linux steps above.
	WSL not installed? Run from an **administrator** shell: `wsl --install`, restart, then `wsl`.
	See [Microsoft's WSL install guide](https://learn.microsoft.com/en-us/windows/wsl/install) for details.
	Your automation client (Puppeteer, Playwright, etc.) can run either inside WSL or on the Windows host — WSL forwards `localhost:9222` automatically.

[Gujiassh]

Applied the WSL wording suggestion on the existing branch.

Updated in b15fc158:

• clarified that there is no native Windows binary
• added the wsl --install bootstrap hint with the Microsoft guide link
• clarified that the automation client can run either inside WSL or on the Windows host via forwarded localhost:9222

[krichprollsch]

thanks @Gujiassh for the contribution and thanks @cdebled for your review 🙏