Refactor tutorial management and add AI image model functionality

- Updated application.properties for local database configuration.
- Introduced DateTimeHelper for timestamp parsing.
- Added MyAIImageModel and MyImageOptions for AI image processing.
- Enhanced Tutorial model to include created and modified timestamps.
- Implemented tutorial editing component with improved UI and functionality.
- Updated user API service to handle tutorial retrieval and updates.
- Refactored tutorials list component to support selection and batch deletion.

jambotron-ui/src/app/user-module/tutorial-edit.component/tutorial-edit.component.spec.ts

@@ -0,0 +1,23 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { TutorialEditComponent } from './tutorial-edit.component';
+
+describe('TutorialEditComponent', () => {
+  let component: TutorialEditComponent;
+  let fixture: ComponentFixture<TutorialEditComponent>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [TutorialEditComponent]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(TutorialEditComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});