8cad1df95d
Introduced a `DependencyInjection` class in the `ReC.Client` namespace to enable dependency injection for `ReCClient`. Added an `AddRecClient` extension method for `IServiceCollection` to register an `HttpClient` with a configurable `apiUri` as the base address. Included conditional `using System;` for .NET Framework compatibility and added `Microsoft.Extensions.DependencyInjection` to support DI services.