Add SerialController with GET /api/serial/ports endpoint

Co-authored-by: ekinnee <1707617+ekinnee@users.noreply.github.com>

Server/Controllers/SerialController.cs

@@ -0,0 +1,59 @@
+using Microsoft.AspNetCore.Mvc;
+using Server.Models;
+using Server.Services;
+
+namespace Server.Controllers
+{
+    /// <summary>
+    /// Controller for serial port management operations
+    /// </summary>
+    [ApiController]
+    [Route("api/[controller]")]
+    [Produces("application/json")]
+    public class SerialController : ControllerBase
+    {
+        private readonly ISerialCommunicationService _serialService;
+        private readonly ILogger<SerialController> _logger;
+
+        public SerialController(ISerialCommunicationService serialService, ILogger<SerialController> logger)
+        {
+            _serialService = serialService ?? throw new ArgumentNullException(nameof(serialService));
+            _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+        }
+
+        /// <summary>
+        /// Gets all available serial ports on the server
+        /// </summary>
+        /// <returns>JSON array of available serial port names</returns>
+        /// <response code="200">Returns the list of available serial ports</response>
+        /// <response code="500">Internal server error</response>
+        [HttpGet("ports")]
+        [ProducesResponseType(typeof(PortListResponse), StatusCodes.Status200OK)]
+        [ProducesResponseType(typeof(ErrorResponse), StatusCodes.Status500InternalServerError)]
+        public ActionResult<PortListResponse> GetPorts()
+        {
+            try
+            {
+                _logger.LogInformation("Getting available serial ports");
+                var ports = _serialService.GetAvailablePorts();
+                
+                var response = new PortListResponse
+                {
+                    Ports = ports
+                };
+
+                _logger.LogInformation("Found {PortCount} available ports", response.Count);
+                return Ok(response);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Error getting available ports");
+                return StatusCode(500, new ErrorResponse 
+                { 
+                    Error = "Internal server error while getting ports",
+                    Details = ex.Message
+                });
+            }
+        }
+    }
+}