Add terminal multiplexer launcher (#1687)

* Add tmux

* Add mux modal

* Restore the settings config version

* Revert typo

* Use DankModal for InputModal

* Simplify terminal flags

* use showWithOptions for inputModals instead

* Fix translation

* use Quickshell.env("TERMINAL") to choose terminal

* Fix typo

* Hide muxModal after creating new session

* Add mux check, moved exclusion to service, And use ScriptModel

* Revert unrelated change

* Add blank line

quickshell/Modals/Settings/SettingsContent.qml

@@ -473,5 +473,20 @@ FocusScope {
                     Qt.callLater(() => item.forceActiveFocus());
             }
         }
+
+        Loader {
+            id: muxLoader
+            anchors.fill: parent
+            active: root.currentIndex === 30
+            visible: active
+            focus: active
+
+            sourceComponent: MuxTab {}
+
+            onActiveChanged: {
+                if (active && item)
+                    Qt.callLater(() => item.forceActiveFocus());
+            }
+        }
     }
 }

quickshell/Modals/Settings/SettingsSidebar.qml

@@ -260,6 +260,12 @@ Rectangle {
                     "tabIndex": 8,
                     "cupsOnly": true
                 },
+                {
+                    "id": "multiplexers",
+                    "text": I18n.tr("Multiplexers"),
+                    "icon": "terminal",
+                    "tabIndex": 30
+                },
                 {
                     "id": "window_rules",
                     "text": I18n.tr("Window Rules"),