chore: Refactor project structure and update DI setup

Die Datei `DIExtensions.cs` wurde erheblich überarbeitet, um Abhängigkeiten von der Schicht `DigitalData.UserManager.Infrastructure` zu entfernen. Die Methode `AddUserManager` wurde vereinfacht und eine Methode `AddEncryptor` hinzugefügt. Die Projektverweise auf die Infrastrukturebene in der Anwendungsprojektdatei wurden entfernt. Aktualisierte Servicedateien zur Verwendung neuer Repository-Schnittstellen aus „DigitalData.UserManager.Application.Contracts.Repositories“. Repository-Schnittstellen wurden in den Namensraum für Anwendungsverträge verschoben und ihre Definitionen aktualisiert. Einführung von `DependencyInjection.cs` für die Handhabung von Infrastrukturdienstregistrierungen. Aktualisierte Repository-Implementierungen, um sie an die neue Struktur anzupassen, die Trennung von Belangen zu verbessern und die Injektion von Abhängigkeiten zu vereinfachen.

DigitalData.UserManager.Infrastructure/DependencyInjection.cs

@@ -0,0 +1,51 @@
+using DigitalData.UserManager.Application;
+using DigitalData.UserManager.Application.Contracts.Repositories;
+using DigitalData.UserManager.Infrastructure.Contracts;
+using DigitalData.UserManager.Infrastructure.Repositories;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace DigitalData.UserManager.Infrastructure;
+
+public static class DependencyInjection
+{
+    /// <summary>
+    /// Adds the UserManager repositories to the specified <see cref="IServiceCollection"/>.
+    /// This method registers the necessary repositories for the UserManager.
+    /// </summary>
+    /// <typeparam name="TDbContext">The type of the DbContext to use for the repositories.</typeparam>
+    /// <param name="services">The IServiceCollection to which the services will be added.</param>
+    /// <returns>The updated IServiceCollection.</returns>
+    public static IServiceCollection AddInfrastructureServices<TDbContext>(this IServiceCollection services)
+            where TDbContext : DbContext, IUserManagerDbContext
+    {
+        return services
+            .AddScoped<IUserRepository, UserRepository<TDbContext>>()
+            .AddScoped<IGroupRepository, GroupRepository<TDbContext>>()
+            .AddScoped<IGroupOfUserRepository, GroupOfUserRepository<TDbContext>>()
+            .AddScoped<IModuleRepository, ModuleRepository<TDbContext>>()
+            .AddScoped<IModuleOfUserRepository, ModuleOfUserRepository<TDbContext>>()
+            .AddScoped<IUserRepRepository, UserRepRepository<TDbContext>>()
+            .AddScoped<IClientUserRepository, ClientUserRepository<TDbContext>>();
+    }
+
+    /// <summary>
+    /// Adds the UserManager services and repositories to the specified <see cref="IServiceCollection"/>.
+    /// This method allows configuring the DbContext options using the provided <paramref name="optionsAction"/>.
+    /// </summary>
+    /// <param name="services">The <see cref="IServiceCollection"/> to which the services will be added.</param>
+    /// <param name="optionsAction">An <see cref="Action{T}"/> to configure the <see cref="DbContextOptionsBuilder"/>.</param>
+    /// <returns>The updated <see cref="IServiceCollection"/>.</returns>
+    public static IServiceCollection AddInfrastructureServices(this IServiceCollection services, Action<DbContextOptionsBuilder> optionsAction) => services
+        .AddDbContext<UserManagerDbContext>(optionsAction)
+        .AddInfrastructureServices<UserManagerDbContext>();
+
+    /// <summary>
+    /// Adds the UserManager services and repositories to the specified <see cref="IServiceCollection"/>.
+    /// This method registers the necessary mappings, repositories, services and <see cref="UserManagerDbContext"/> for the UserManager.
+    /// </summary>
+    /// <param name="services">The IServiceCollection to which the services will be added.</param>
+    /// <returns>The updated IServiceCollection.</returns>
+    public static IServiceCollection AddInfrastructureServices(this IServiceCollection services, string connectionString) => services
+        .AddInfrastructureServices(options => options.UseSqlServer(connectionString).EnableSensitiveDataLogging());
+}