feat: adding new classes is done

app.py

@@ -13,6 +13,7 @@ from routes.assessments import bp as assessments_bp
 from routes.grading import bp as grading_bp
 from routes.config import bp as config_bp
 from routes.domains import bp as domains_bp
+from routes.classes import bp as classes_bp
 
 def create_app(config_name=None):
     if config_name is None:
@@ -43,6 +44,7 @@ def create_app(config_name=None):
     app.register_blueprint(grading_bp)
     app.register_blueprint(config_bp)
     app.register_blueprint(domains_bp)
+    app.register_blueprint(classes_bp)
 
     # Register CLI commands
     app.cli.add_command(init_db)