Various changes (Controller and test)

- Added RootController
- Added new methods in BaseController
- Added BaseResponse
- Changed Program structure
- Added first basic test for Program

MainProject/Controllers/RootController.cs

@@ -0,0 +1,22 @@
+using Microsoft.AspNetCore.Mvc;
+using BasicDotnetTemplate.MainProject.Models.Settings;
+
+namespace BasicDotnetTemplate.MainProject.Controllers
+{
+    public class RootController : BaseController
+    {
+        public RootController(
+            IConfiguration configuration
+        ) : base(configuration)
+        {
+
+        }
+
+        [HttpGet]
+        [Route("")]
+        public IActionResult GetVersion()
+        {
+            return Success(String.Empty, "Success");
+        }
+    }
+}