rename ravenlog to krowlog

There is a database named RavenDB.
KrowLog starts with a K, which is a) distinctive and b) has an association to KDE.

src/ui/vbox.py

@@ -0,0 +1,9 @@
+from PySide6.QtWidgets import QWidget, QVBoxLayout
+
+
+class VBox(QWidget):
+    def __init__(self, *widgets: QWidget):
+        super(VBox, self).__init__()
+        self.layout = QVBoxLayout(self)
+        for widget in widgets:
+            self.layout.addWidget(widget)