Add ProfileController with MediatR GET endpoint

Introduced ProfileController to the API, implementing a GET endpoint that uses MediatR to handle ReadProfileViewQuery requests and return profile data. This supports CQRS and structured profile retrieval.

src/ReC.API/Controllers/ProfileController.cs

@@ -0,0 +1,16 @@
+using MediatR;
+using Microsoft.AspNetCore.Mvc;
+using ReC.Application.Profile.Queries;
+
+namespace ReC.API.Controllers;
+
+[Route("api/[controller]")]
+[ApiController]
+public class ProfileController(IMediator mediator) : ControllerBase
+{
+    [HttpGet]
+    public async Task<IActionResult> GetProfile([FromQuery] ReadProfileViewQuery query, CancellationToken cancel)
+    {
+        return Ok(await mediator.Send(query, cancel));
+    }
+}