Added missing files and removed unnessesary ones

Python/pyqt6_4/snippets/4.py

@@ -0,0 +1,27 @@
+import sys
+
+from PyQt6.QtGui import QFont
+from PyQt6.QtWidgets import QApplication, QLineEdit, QWidget
+
+
+class Window(QWidget):
+    def __init__(self) -> None:
+        super().__init__()
+        self.setGeometry(*(500,) * 4)
+        self.setWindowTitle("Окно")
+
+        line_edit = QLineEdit(self)
+        line_edit.setFont(QFont("Times", 14))
+        line_edit.setPlaceholderText("Enter your password")
+        line_edit.setEchoMode(QLineEdit.EchoMode.Password)
+
+
+def main() -> None:
+    app = QApplication(sys.argv)
+    window = Window()
+    window.show()
+    sys.exit(app.exec())
+
+
+if __name__ == "__main__":
+    main()