feat(mango): first-class MangoWM support across DMS, dankinstaller & UI tools

- Bring up Mango to parity with niri/hyprland via a native JSON-IPC w/Native MangoServic., replaces the legacy dwl/`mmsg` path and recent breaking changes
- Dankinstall: mango supported installer, config/binds templates, and packaging (Arch AUR, Fedora Terra auto-enable, Gentoo GURU)
- Window rules: Go provider + CLI + Settings GUI editor
- Keybinds + config reload on edit (mmsg dispatch reload_config)
- Misc new supported options in DMS settings

quickshell/Modules/Settings/DankBarTab.qml

@@ -659,7 +659,7 @@ Item {
 
                     SettingsToggleRow {
                         width: parent.width - parent.leftPadding
-                        visible: CompositorService.isNiri || CompositorService.isHyprland
+                        visible: CompositorService.isNiri || CompositorService.isHyprland || CompositorService.isMango
                         text: I18n.tr("Hide When Windows Open")
                         description: I18n.tr("Show the bar only when no windows are open")
                         checked: selectedBarConfig?.showOnWindowsOpen ?? false
@@ -1144,7 +1144,7 @@ Item {
                 iconName: "fit_screen"
                 title: I18n.tr("Maximize Detection")
                 description: I18n.tr("Remove gaps and border when windows are maximized")
-                visible: selectedBarConfig?.enabled && (CompositorService.isNiri || CompositorService.isHyprland)
+                visible: selectedBarConfig?.enabled && (CompositorService.isNiri || CompositorService.isHyprland || CompositorService.isMango)
                 checked: selectedBarConfig?.maximizeDetection ?? true
                 onToggled: checked => SettingsData.updateBarConfig(selectedBarId, {
                         maximizeDetection: checked