Add ability to set auth scopes via request options

[rickykaare]

No description provided.

[Copilot]

Pull Request Overview

Adds support for multiple authentication scopes via request options

• Converts GetScope APIs to GetScopes returning string[] and updates generator, handler, builder, and sample code accordingly
• Introduces HttpRequestMessageExtensions to set/get per-request scopes
• Updates all related tests to pass and verify scope arrays instead of single TokenRequestContext

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
test/Cabazure.Client.Tests/ClientInitializationGeneratorTests.CanGenerate_Initialization#ClientInitialization.Implementation.g.verified.cs	Update generator test to use GetScopes and pass scope array to handler
test/Cabazure.Client.Runtime.Tests/Builder/HttpClientBuilderExtensionsTests.cs	Rename test to use scopes and replace TokenRequestContext with string[]
test/Cabazure.Client.Runtime.Tests/Authentication/BearerTokenProviderTests.cs	Update tests to call GetTokenAsync(string[] scopes, token)
test/Cabazure.Client.Runtime.Tests/Authentication/AzureAuthenticationHandlerTests.cs	Adjust handler test to expect GetTokenAsync(string[], CancellationToken)
src/Cabazure.Client/ClientInitializationGenerator.cs	Replace GetScope/TokenRequestContext calls with GetScopes/string[]
src/Cabazure.Client.Runtime/ICabazureAuthClientOptions.cs	Change GetScope() to GetScopes(): string[]
src/Cabazure.Client.Runtime/HttpRequestMessageExtensions.cs	Add extensions to store and retrieve string[] scopes on HttpRequestMessage
src/Cabazure.Client.Runtime/Builder/HttpClientBuilderExtensions.cs	Modify AddAuthentication overloads to accept scopes arrays
src/Cabazure.Client.Runtime/Authentication/IBearerTokenProvider.cs	Update interface to GetTokenAsync(string[] scopes, CancellationToken)
src/Cabazure.Client.Runtime/Authentication/BearerTokenProvider.cs	Implement per-scope caching and use string[] scopes for token requests
src/Cabazure.Client.Runtime/Authentication/AzureAuthenticationHandler.cs	Read scopes from request or default and pass to GetTokenAsync
samples/AzureRest/AzureRest.Client/AzureRestClientOptions.cs	Update sample to implement GetScopes() returning an array

Comments suppressed due to low confidence (2)

test/Cabazure.Client.Runtime.Tests/Builder/HttpClientBuilderExtensionsTests.cs:36

• [nitpick] The parameter name context is misleading for a scopes array. Rename it to scopes to accurately reflect its purpose.

string[] context,

src/Cabazure.Client.Runtime/HttpRequestMessageExtensions.cs:1

• This extension references HttpRequestMessage but is missing using System.Net.Http;, causing a compile error. Add the appropriate using directive.

namespace Cabazure.Client;