add application style setting and requirements file for dependencies

main.py

@@ -8,6 +8,7 @@ from controllers.main_controller import MainController
 
 def main():
     app = QApplication(sys.argv)
+    app.setStyle("Fusion")
     window = MainWindow()
     controller = MainController(window)
     controller.load_colors()

requirements.txt

@@ -0,0 +1,6 @@
+numpy==2.2.6
+opencv-python==4.12.0.88
+PySide6==6.9.2
+PySide6_Addons==6.9.2
+PySide6_Essentials==6.9.2
+shiboken6==6.9.2