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.

src/main/resources/application.properties

@@ -2,32 +2,32 @@ spring.application.name=jambotron
 
 #============Localhost Configurations========================
 
-#spring.datasource.url= jdbc:postgresql://localhost:5432/jambotronDB
-#spring.datasource.username= admin
-#spring.datasource.password= postgrespw
-
-#spring.flyway.baseline-on-migrate=true
-#spring.flyway.validate-on-migrate=true
-#
-#spring.flyway.url=jdbc:postgresql://localhost:5432/jambotronDB
-#spring.flyway.user=admin
-#spring.flyway.password=postgrespw
-
-
-#============Koyeb Configurations========================
-
-spring.datasource.url= jdbc:postgresql://ep-red-breeze-a2cxhq5f.eu-central-1.pg.koyeb.app/jambotronDB
-spring.datasource.username= koyeb-adm
-spring.datasource.password= npg_HfFEUA7bay1i
+spring.datasource.url= jdbc:postgresql://localhost:5432/jambotronDB
+spring.datasource.username= admin
+spring.datasource.password= postgrespw
 
 spring.flyway.baseline-on-migrate=true
 spring.flyway.validate-on-migrate=true
 
-spring.flyway.url=jdbc:postgresql://ep-red-breeze-a2cxhq5f.eu-central-1.pg.koyeb.app/jambotronDB
-spring.flyway.user=koyeb-adm
-spring.flyway.password=npg_HfFEUA7bay1i
+spring.flyway.url=jdbc:postgresql://localhost:5432/jambotronDB
+spring.flyway.user=admin
+spring.flyway.password=postgrespw
 
 
+#============Koyeb Configurations========================
+
+#spring.datasource.url= jdbc:postgresql://ep-red-breeze-a2cxhq5f.eu-central-1.pg.koyeb.app/jambotronDB
+#spring.datasource.username= koyeb-adm
+#spring.datasource.password= npg_HfFEUA7bay1i
+#
+#spring.flyway.baseline-on-migrate=true
+#spring.flyway.validate-on-migrate=true
+#
+#spring.flyway.url=jdbc:postgresql://ep-red-breeze-a2cxhq5f.eu-central-1.pg.koyeb.app/jambotronDB
+#spring.flyway.user=koyeb-adm
+#spring.flyway.password=npg_HfFEUA7bay1i
+#
+
 #spring.datasource.url=${SPRING_DATASOURCE_URL}
 #spring.datasource.username=${SPRING_DATASOURCE_USERNAME}
 #spring.datasource.password=${SPRING_DATASOURCE_PASSWORD}