feat(control-center): add DiskUsage widget config overlay with showMountPath toggle and standardized tile sizing (#2507)

* feat(control-center): add widget config overlay with showMountPath toggle for DiskUsage

Introduces WidgetConfigOverlay and DiskUsageWidgetConfigMenu components, allowing
users to toggle mount path visibility per DiskUsage widget in edit mode

* refactor(control-center): use Theme.iconSizeLarge and Theme.fontSizeLarge for small tiles

Standardize SmallDiskUsageButton and SmallBatteryButton sizing with Theme.iconSizeLarge
and Theme.fontSizeLarge, and unify font weight to Font.Bold on both tile widgets.

* fix(control-center): adjust SmallDiskUsageButton font size based on showMountPath

* refactor(control-center): simplify DiskUsage config menu i18n strings

Remove the redundant "Disk Usage Widget" title and the toggle description
to reduce translatable strings

quickshell/Modules/ControlCenter/Components/DiskUsageWidgetConfigMenu.qml

@@ -0,0 +1,38 @@
+import QtQuick
+import qs.Common
+import qs.Widgets
+
+Rectangle {
+    id: root
+
+    property var widgetData: null
+
+    signal showMountPathChanged(bool show)
+
+    width: 260
+    height: menuColumn.implicitHeight + Theme.spacingS * 2
+    radius: Theme.cornerRadius
+    color: Theme.surfaceContainer
+    border.color: Qt.rgba(Theme.outline.r, Theme.outline.g, Theme.outline.b, 0.16)
+    border.width: 1
+
+    MouseArea {
+        anchors.fill: parent
+    }
+
+    Column {
+        id: menuColumn
+        anchors.fill: parent
+        anchors.margins: Theme.spacingS
+        spacing: 2
+
+        DankToggle {
+            width: parent.width
+            text: I18n.tr("Show mount path", "toggle in control center disk usage widget to turn mount path display on or off")
+            checked: root.widgetData?.showMountPath !== false
+            onToggled: newChecked => {
+                root.showMountPathChanged(newChecked);
+            }
+        }
+    }
+}