Update BrowserSignin initializer to not throw unnecessarily

[AlexNachbaur]

The BrowserSignin initializer was only throwing because the AuthorizationCodeFlow's initializer being used was throwing if the redirectUri was nil. However, BrowserSignin was accepting a non-optional URL for that same value. As a result, AuthorizationCodeFlow would never throw.

Instead of using try! to prevent this (since the initializer may change in the future), I rearranged the code to utilize initializers that would prevent needing to use throws.

[Copilot]

Pull Request Overview

This PR refactors the BrowserSignin initializer to remove unnecessary throwing behavior by directly using non-throwing AuthorizationCodeFlow and SessionLogoutFlow initializers instead of relying on OAuth2Client's throwing initializer.

• Replaces throwing BrowserSignin convenience initializers with non-throwing versions
• Updates AuthorizationCodeFlow convenience initializers to accept an optional logoutRedirectUri parameter
• Modifies test code to use the new non-throwing initialization patterns

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
Sources/BrowserSignin/BrowserSignin.swift	Removes throws from convenience initializers and restructures initialization to use AuthorizationCodeFlow and SessionLogoutFlow directly
Sources/OAuth2Auth/Authentication/AuthorizationCodeFlow.swift	Adds logoutRedirectUri parameter to convenience initializers
Tests/BrowserSigninTests/BrowserSigninInitializerTests.swift	Updates test to use non-throwing initializer
Tests/BrowserSigninTests/BrowserSigninFlowTests.swift	Refactors tests to manually create flows instead of using BrowserSignin convenience initializer
Sources/AuthFoundation/JWT/Protocols/Claim.swift	Adds Sendable, Hashable, Equatable conformance to IsClaim protocol

---

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

[IldarAbdullin-okta]

LGTM!