feat: IConfiguration for system and other configurations

Engine.Core/Config/ConfigurationExtensions.cs

@@ -0,0 +1,8 @@
+using Engine.Core.Exceptions;
+
+namespace Engine.Core.Config;
+
+public static class ConfigurationExtensions
+{
+    public static T GetRequired<T>(this IConfiguration configuration, string key) => configuration.Get<T>(key) ?? throw new NotFoundException($"Type of {typeof(T).FullName} with the key {key} was not present in the {configuration.GetType().FullName}");
+}