New interfaces

[magesoe]

• Added extension method that adds the interfaces ServiceClient implements
• Added extension method that adds a ServiceClientFactory

[Copilot]

Pull Request Overview

This PR introduces new interfaces and extension methods to enhance how ServiceClient instances are registered and resolved, including a new factory pattern for scenarios that require multiple or long-running client instances.

• Adds documentation in the README.md for using ServiceClientFactory.
• Updates DI registration in Program.cs with new interfaces and a factory.
• Introduces new extension methods and supporting files in the DataverseConnection library to create and manage ServiceClient instances.

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
README.md	Updated docs with instructions on using ServiceClientFactory for advanced scenarios.
DataverseWhoAmI/Program.cs	Updated sample code to resolve ServiceClient via different interfaces and the factory.
DataverseConnection/ServiceCollectionExtensions.cs	Added extension methods to register both ServiceClient and organization service interfaces plus factory.
DataverseConnection/ServiceClientFactory.cs	Added a new factory class implementing IServiceClientFactory for creating new ServiceClient instances.
DataverseConnection/Internal/ServiceClientBuilder.cs	Updated internal builder logic with new C# syntax for array initialization in the token provider.
DataverseConnection/IServiceClientFactory.cs	Added a new factory interface for creating ServiceClient instances.
DataverseConnection/DataverseConnection.csproj	Updated dependency for Microsoft.Extensions.Caching.Memory from version 8.0.0 to 9.0.0.

Comments suppressed due to low confidence (1)

DataverseConnection/Internal/ServiceClientBuilder.cs:41

• [nitpick] The square bracket syntax for array initialization is valid in C# 12; consider adding an inline comment to briefly explain this new syntax to help maintainers unfamiliar with recent language updates.

var tokenRequestContext = new TokenRequestContext([resource]);