Bidi: Unlock dialog tests

[kblok]

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[Copilot]

Pull Request Overview

Adds foundational WebDriver BiDi (bidirectional protocol) support alongside existing CDP implementation, refactoring abstractions (sessions, handles, targets) and introducing a parallel BiDi object model (browser, contexts, pages, frames, network, realms, etc.). Also updates tests to run under either protocol and introduces protocol selection and related feature adaptations (navigation, screenshots, dialogs, request handling). Key refactors remove CDP-specific members from shared interfaces and introduce protocol-agnostic abstractions.

• Introduces ProtocolType enum and internal protocol selection plumbing (LaunchOptions, ConnectOptions, tests).
• Adds extensive BiDi implementation (BidiBrowser, contexts, pages, frames, realms, network/request/response, input, dialog) plus supporting abstractions (ICDPSession, ICdpHandle).
• Refactors existing CDP-specific code paths (Target, NetworkManager, Page, ElementHandle, ExecutionContext, query selector registry) to be protocol neutral and updates tests accordingly.

Reviewed Changes

Copilot reviewed 147 out of 148 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
ProtocolType.cs	Adds protocol enumeration enabling selection between CDP and BiDi.
LaunchOptions.cs / ConnectOptions.cs	Adds internal Protocol selection and initial page wait option.
ICDPSession / ICdpHandle	Introduces protocol-agnostic CDP abstractions for handles/sessions.
Target / TargetChangedArgs / CdpTarget et al.	Refactors target model; moves CDP specifics into CdpTarget; adjusts TargetInfo access.
NetworkManager.cs & CdpBrowser.cs	Moves certificate ignore logic; adapts network manager to be protocol neutral.
Browser.cs / BidiBrowser.cs	Adds BiDi browser implementation and protocol property; adjusts dispose logic.
Bidi/* (many files)	Implements BiDi versions of browser, contexts, pages, frames, realms, networking, input, dialogs.
Page / Frame / ElementHandle changes	Protocol neutral event raising, screenshot handling, selector registry centralization.
CustomQuerySelectorRegistry.cs	Introduces static Default registry shared across components.
NavigationOptions.cs	Adds optional CancellationToken support for navigation.
NavigationException.cs	Adds inner exception for richer error context.
Tests (multiple)	Adapts tests for dual protocol, adds BiDi assertions, adjusts expectations, adds protocol selection in constants.

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