[FEAT] Add Health Check Endpoint

src/Hng.Web/Controllers/HealthCheckController.cs

@@ -0,0 +1,44 @@
+using Microsoft.AspNetCore.Mvc;
+
+namespace Hng.Web.Controllers
+{
+    [Route("")]
+    [ApiController]
+    public class HealthCheckController : ControllerBase
+    {
+        /// <summary>
+        /// Health Check Endpoint - Verifies that the API is running.
+        /// </summary>
+        /// <returns>Returns API health status.</returns>
+        [HttpGet]
+        [ProducesResponseType(typeof(HealthCheckResponse), 200)]
+        [ProducesResponseType(500)]
+        public ActionResult<HealthCheckResponse> GetHealthCheck()
+        {
+            var response = new HealthCheckResponse
+            {
+                StatusCode = 200,
+                Message = "Welcome to C-Sharp Backend Endpoint"
+            };
+
+            return new OkObjectResult(response);
+        }
+    }
+
+    /// <summary>
+    /// Represents the response structure for the health check endpoint.
+    /// </summary>
+    public class HealthCheckResponse
+    {
+        /// <summary>
+        /// HTTP status code.
+        /// </summary>
+        public int StatusCode { get; set; }
+
+        /// <summary>
+        /// Message indicating the API status.
+        /// </summary>
+        public string Message { get; set; }
+    }
+}
+