feat: Hinzufügen von Erweiterungsmethoden zum Abrufen von Konfigurationsoptionen von IServiceProvider

- Implementiert GetOptions<TOptions> zum Abrufen von Optionen oder null.
- Implementiert GetRequiredOptions<TOptions> für den Abruf von Optionen oder das Auslösen einer Ausnahme.

DigitalData.Core.Abstractions/ServiceProviderExtensions.cs

@@ -0,0 +1,31 @@
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Options;
+
+namespace DigitalData.Core.Abstractions;
+
+/// <summary>
+/// Extension methods for <see cref="IServiceProvider"/> to retrieve configuration options.
+/// </summary>
+public static class ServiceProviderExtensions
+{
+    /// <summary>
+    /// Retrieves an instance of <typeparamref name="TOptions"/> from the <see cref="IServiceProvider"/>.
+    /// If the options are not registered, returns null.
+    /// </summary>
+    /// <typeparam name="TOptions">The type of the options to retrieve.</typeparam>
+    /// <param name="service">The service provider instance.</param>
+    /// <returns>An instance of <typeparamref name="TOptions"/> or null if not found.</returns>
+    public static TOptions? GetOptions<TOptions>(this IServiceProvider service) where TOptions : class
+        => service.GetService<IOptions<TOptions>>()?.Value;
+
+    /// <summary>
+    /// Retrieves an instance of <typeparamref name="TOptions"/> from the <see cref="IServiceProvider"/>.
+    /// Throws an exception if the options are not registered.
+    /// </summary>
+    /// <typeparam name="TOptions">The type of the options to retrieve.</typeparam>
+    /// <param name="service">The service provider instance.</param>
+    /// <returns>An instance of <typeparamref name="TOptions"/>.</returns>
+    /// <exception cref="InvalidOperationException">Thrown when the options are not registered.</exception>
+    public static TOptions GetRequiredOptions<TOptions>(this IServiceProvider service) where TOptions : class
+        => service.GetRequiredService<IOptions<TOptions>>().Value;
+}