Add CommonController with POST endpoint using MediatR

Introduced CommonController in the ReC.API.Controllers namespace with a POST endpoint at "api/common". The endpoint accepts an InsertObjectProcedure from the request body, sends it via MediatR, and returns a 201 Created response with the generated ID.

src/ReC.API/Controllers/CommonController.cs

@@ -0,0 +1,17 @@
+using MediatR;
+using Microsoft.AspNetCore.Mvc;
+using ReC.Application.Common.Procedures.InsertProcedure;
+
+namespace ReC.API.Controllers;
+
+[Route("api/[controller]")]
+[ApiController]
+public class CommonController(IMediator mediator) : ControllerBase
+{
+    [HttpPost]
+    public async Task<IActionResult> CreateObject([FromBody] InsertObjectProcedure procedure, CancellationToken cancel)
+    {
+        var id = await mediator.Send(procedure, cancel);
+        return StatusCode(StatusCodes.Status201Created, id);
+    }
+}