refactor(di): unify Application and Infrastructure DI registrations under a central method

- Added central AddEnvelopeGenerator extension to aggregate existing DI setups
- Introduced EGConfiguration for modular service registration
- Standardized configuration pattern for Application and Infrastructure layers
- Simplified distributed cache and localization registration

EnvelopeGenerator.Infrastructure/DependencyInjection.cs

@@ -38,10 +38,10 @@ namespace EnvelopeGenerator.Infrastructure
         /// will be created per HTTP request (or per scope) within the dependency injection container.
         /// </remarks>
         [Obsolete("Use IRepository")]
-        public static IServiceCollection AddEnvelopeGeneratorInfrastructureServices(this IServiceCollection services, Action<Config> options)
+        public static IServiceCollection AddEGInfrastructureServices(this IServiceCollection services, Action<EGInfrastructureConfiguration> options)
         {
             // configure custom options
-            options(new Config(services));
+            options(new EGInfrastructureConfiguration(services));
 #if NET
             services.TryAddScoped<IConfigRepository, ConfigRepository>();
             services.TryAddScoped<IDocumentReceiverElementRepository, DocumentReceiverElementRepository>();
@@ -160,11 +160,11 @@ namespace EnvelopeGenerator.Infrastructure
         }
 #endif
 
-        public class Config
+        public class EGInfrastructureConfiguration
         {
             private readonly IServiceCollection _services;
 
-            internal Config(IServiceCollection services)
+            internal EGInfrastructureConfiguration(IServiceCollection services)
             {
                 _services = services;
             }