Bidi frame spec

[kblok]

No description provided.

[Copilot]

Pull Request Overview

This PR implements frame detachment detection for the WebDriver BiDi protocol by adding support for checking whether frames have been closed/detached. The changes enable proper error handling when attempting to evaluate JavaScript in detached frames.

Key Changes:

• Added Detached property support for BiDi frames linked to the browsing context's closed state
• Implemented detachment checks in the evaluation pipeline to throw appropriate errors
• Removed test expectations for now-passing frame, fixture, crash, device-request-prompt, diffstyle, and drag-and-drop test suites

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
lib/PuppeteerSharp/Frame.cs	Made Detached property virtual to allow BiDi override
lib/PuppeteerSharp/Bidi/Core/BrowsingContext.cs	Added IsClosed property to track browsing context closure state
lib/PuppeteerSharp/Bidi/BidiRealm.cs	Added virtual ThrowIfDetached() method and its invocation in evaluation pipeline
lib/PuppeteerSharp/Bidi/BidiFrameRealm.cs	Implemented detachment check that throws exception for detached frames
lib/PuppeteerSharp/Bidi/BidiFrame.cs	Overrode Detached property to return browsing context closure state
lib/PuppeteerSharp.Nunit/TestExpectations/TestExpectations.local.json	Removed failing test expectations for multiple test suites now passing with BiDi implementation

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}