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/DankBar/Widgets/DiskUsage.qml

@@ -10,6 +10,7 @@ BasePill {
     property var widgetData: null
     property string mountPath: (widgetData && widgetData.mountPath !== undefined) ? widgetData.mountPath : "/"
     property int diskUsageMode: (widgetData && widgetData.diskUsageMode !== undefined) ? widgetData.diskUsageMode : 0
+    property bool showMountPath: (widgetData && widgetData.showMountPath !== undefined) ? widgetData.showMountPath : true
     property bool isHovered: mouseArea.containsMouse
     property bool isAutoHideBar: false
     property bool minimumWidth: (widgetData && widgetData.minimumWidth !== undefined) ? widgetData.minimumWidth : true
@@ -179,6 +180,7 @@ BasePill {
 
                 StyledText {
                     id: mountText
+                    visible: root.showMountPath
                     text: {
                         if (!root.selectedMount) {
                             return "--";