reorganize repo: move shell sources into shell/, test scripts into test/

shell/modules/Clock.qml

@@ -0,0 +1,14 @@
+import QtQuick
+import Quickshell
+import "." as M
+
+M.BarLabel {
+    SystemClock {
+        id: clock
+        precision: SystemClock.Seconds
+    }
+
+    font.pixelSize: M.Theme.fontSize + 1
+    label: Qt.formatDateTime(clock.date, "ddd, dd. MMM  HH:mm")
+    tooltip: Qt.formatDateTime(clock.date, "dddd, dd. MMMM yyyy\nHH:mm:ss")
+}