Refactor GetOrCreateCommand to GetOrCreateEndpointCommand

Renamed `GetOrCreateCommand` to `GetOrCreateEndpointCommand`
to improve clarity and consistency. Removed the old
`GetOrCreateCommand` class and handler, and introduced the
new `GetOrCreateEndpointCommand` class with equivalent
functionality.

Updated `MappingProfile` to reflect the new command name
and adjusted `CreateRecActionCommand` to use the renamed
command. Added the appropriate namespace for the new class
to ensure proper organization.

src/ReC.Application/Endpoints/Commands/GetOrCreateEndpointCommand.cs.cs

@@ -5,14 +5,14 @@ using ReC.Domain.Entities;
 
 namespace ReC.Application.Endpoints.Commands;
 
-public class GetOrCreateCommand : IRequest<Endpoint>
+public class GetOrCreateEndpointCommand : IRequest<Endpoint>
 {
     public string Uri { get; init; } = null!;
 }
 
-public class GetOrCreateCommandHandler(IRepository<Endpoint> repo) : IRequestHandler<GetOrCreateCommand, Endpoint>
+public class GetOrCreateEndpointCommandHandler(IRepository<Endpoint> repo) : IRequestHandler<GetOrCreateEndpointCommand, Endpoint>
 {
-    public async Task<Endpoint> Handle(GetOrCreateCommand request, CancellationToken cancel)
+    public async Task<Endpoint> Handle(GetOrCreateEndpointCommand request, CancellationToken cancel)
     {
         var endpoint = await repo.Where(e => e.Uri == request.Uri).FirstOrDefaultAsync(cancel);