Add InvokeRecActionQuery class for MediatR request

Introduced the `InvokeRecActionQuery` class in the `ReC.Application.RecActions.Commands` namespace to implement the Mediator pattern using the MediatR library.

- Added `using MediatR;` directive to include the library.
- Implemented `IRequest` interface in the new class.
- Added `ProfileId` property with `init` accessor for immutability.
- Organized the code under a new namespace for better structure.

src/ReC.Application/RecActions/Commands/InvokeRecActionQuery.cs

@@ -0,0 +1,8 @@
+using MediatR;
+
+namespace ReC.Application.RecActions.Commands;
+
+public class InvokeRecActionQuery : IRequest
+{
+    public int ProfileId { get; init; }
+}