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

@@ -503,5 +503,20 @@ 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());
+            }
+        }
     }
 }