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/Common/settings/SettingsSpec.js

@@ -260,6 +260,11 @@ var SPEC = {
     syncModeWithPortal: { def: true },
     terminalsAlwaysDark: { def: false, onChange: "regenSystemThemes" },
 
+    muxType: { def: "tmux" },
+    muxUseCustomCommand: { def: false },
+    muxCustomCommand: { def: "" },
+    muxSessionFilter: { def: "" },
+
     runDmsMatugenTemplates: { def: true },
     matugenTemplateGtk: { def: true },
     matugenTemplateNiri: { def: true },