refactor: improve formatting and documentation in IEntity and IResponse interfaces

src/Shop.Core/SharedKernel/IEntity.cs

@@ -11,7 +11,8 @@ public interface IEntity;
 /// This is the base interface for all entities with a key.
 /// </summary>
 /// <typeparam name="TKey">The type of the entity key.</typeparam>
-public interface IEntity<out TKey> : IEntity where TKey : IEquatable<TKey>
+public interface IEntity<out TKey> : IEntity
+    where TKey : IEquatable<TKey>
 {
     /// <summary>
     /// Gets the ID of the entity.

src/Shop.Core/SharedKernel/IResponse.cs

@@ -1,3 +1,6 @@
 namespace Shop.Core.SharedKernel;
 
+/// <summary>
+/// Represents a response from a query.
+/// </summary>
 public interface IResponse;