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/models/tutorial.model.ts

@@ -1,6 +1,47 @@
 export class Tutorial {
+  isSelected?: boolean;
   id?: any;
   title?: string;
   description?: string;
   published?: boolean;
+  created?: Date;
+  modified?: Date;
+  isEdit?: boolean;
 }
+
+export const TutorialColumns = [
+  {
+    key: 'isSelected',
+    type: 'isSelected',
+    label: '',
+  },
+  {
+    key: 'title',
+    type: 'text',
+    label: 'Title',
+    required: true,
+  },
+  {
+    key: 'published',
+    type: 'boolean',
+    label: 'Is Published',
+  },
+  {
+    key: 'created',
+    type: 'datetime',
+    label: 'Created Date',
+    required: true,
+
+  },
+  {
+    key: 'modified',
+    type: 'datetime',
+    label: 'Modified Date',
+    required: true
+  },
+  {
+    key: 'isEdit',
+    type: 'isEdit',
+    label: '',
+  }
+];