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/VersionController.cs

@@ -16,7 +16,7 @@ namespace BasicDotnetTemplate.MainProject.Controllers
         [Route("version")]
         public IActionResult GetVersion()
         {
-            return Ok(new { version = _appSettings.Settings.Version });
+            return Success(String.Empty, _appSettings?.Settings?.Version);
         }
     }
 }