separate cli and gui application in own python packages. provide database schema as python package.

python/kontor-gui/gui/data_view_model.py

@@ -0,0 +1,32 @@
+from typing import List
+
+from PySide6.QtCore import QModelIndex, QAbstractTableModel
+from PySide6.QtGui import Qt
+
+from gui.data_view import DataViewMeta
+
+
+class DataViewModel(QAbstractTableModel):
+    def __init__(self):
+        super().__init__()
+        self.main_window = None
+        self._config = None
+        self._data = List[DataViewMeta]
+
+    def rowCount(self, parent=QModelIndex()):
+        return len(self._data)
+
+    def columnCount(self, parent=QModelIndex()):
+        return 0
+
+    def headerData(self, section, orientation, role=Qt.ItemDataRole.DisplayRole):
+        return None
+
+    def data(self, index, role=Qt.ItemDataRole.DisplayRole):
+        return None
+
+    def setData(self, index, value, role=Qt.ItemDataRole.EditRole):
+        return False
+
+    def flags(self, index):
+        return None