Add simple main file

project/main.py

@@ -0,0 +1,28 @@
+from PySide6.QtWidgets import QMainWindow, QApplication, QLabel, QVBoxLayout, QPushButton, QWidget
+from PySide6.QtGui import QIcon
+from . import name as project_name
+
+import sys
+
+class MainWindow(QMainWindow):
+
+    def __init__(self):
+        super().__init__()
+
+        self.setWindowTitle(project_name)
+        layout = QVBoxLayout()
+        label = QLabel("HELLOOOO.")
+        label.setMargin(10)
+        layout.addWidget(label)
+
+        container = QWidget()
+        container.setLayout(layout)
+
+        self.setCentralWidget(container)
+
+        self.show()
+
+if __name__ == '__main__':
+    app = QApplication(sys.argv)
+    w = MainWindow()
+    app.exec_()