[🚀 Feature]: [dotnet] [bidi] Support browser GetClientWindows command

[nvborisenko]

Feature and motivation

https://w3c.github.io/webdriver-bidi/#command-browser-getClientWindows

Usage example

await bidi.Browser.GetClientWindowsAsync()

[github-actions]

@nvborisenko, thank you for creating this issue. We will troubleshoot it as soon as we can.

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Thank you!

[nvborisenko]

Don't forget that BrowsingContext instance has a reference to ClientWindow

[github-actions]

This issue has been automatically locked since there has not been any recent activity since it was closed. Please open a new issue for related bugs.