Add BodyQueryBehavior and register in MediatR pipeline

Introduced the `BodyQueryBehavior<TRecAction>` class, which implements the `IPipelineBehavior` interface to handle actions of type `RecActionDto`. The behavior is currently unimplemented and throws a `NotImplementedException`.

Updated the `DependencyInjection` class to register `BodyQueryBehavior<>` as an open generic pipeline behavior in MediatR. Added necessary `using` directives in both `DependencyInjection.cs` and `BodyQueryBehavior.cs` to support the new behavior.

src/ReC.Application/DependencyInjection.cs

@@ -1,6 +1,7 @@
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using ReC.Application.Common.Options;
+using ReC.Application.RecActions.Behaviors;
 using System.Reflection;
 
 namespace ReC.Application;
@@ -25,6 +26,7 @@ public static class DependencyInjection
         services.AddMediatR(cfg =>
         {
             cfg.RegisterServicesFromAssembly(Assembly.GetExecutingAssembly());
+            cfg.AddOpenBehaviors([typeof(BodyQueryBehavior<>)]);
             cfg.LicenseKey = configOpt.LuckyPennySoftwareLicenseKey;
         });