Update SurveyLib and moved all AddScoped to DI methods

SurveyBackend/SurveyBackend.Infrastructure/DependencyInjection.cs

@@ -0,0 +1,16 @@
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using SurveyBackend.Core.Repositories;
+using SurveyBackend.Infrastructure.Repositories;
+
+namespace SurveyBackend.Infrastructure;
+
+public static class DependencyInjection
+{
+    public static IServiceCollection AddSurveyBackendInfrastructure(this IServiceCollection services)
+    {
+        services.AddScoped<IUserRepository, UserRepository>();
+        
+        return services;
+    }
+}