compositor+matugen: border override, hypr/mango layout overrides, new

templates, respect XDG paths
- Add Hyprland and MangoWC templates
- Add GUI gaps, window radius, and border thickness overrides for niri,
  Hyprland, and MangoWC
- Add replacement support in matugen templates for DATA_DIR, CACHE_DIR,
  CONFIG_DIR
fixes #1274
fixes #1273

quickshell/Widgets/DankToggle.qml

@@ -14,6 +14,7 @@ Item {
     property bool toggling: false
     property string text: ""
     property string description: ""
+    property color descriptionColor: Theme.surfaceVariantText
     property bool hideText: false
 
     signal clicked
@@ -79,7 +80,7 @@ Item {
             StyledText {
                 text: toggle.description
                 font.pixelSize: Appearance.fontSize.small
-                color: Theme.surfaceVariantText
+                color: toggle.descriptionColor
                 wrapMode: Text.WordWrap
                 width: Math.min(implicitWidth, toggle.width - 120)
                 visible: toggle.description.length > 0