feature: add login sound functionality and settings entry (#2155)

* added login sound functionality and settings entry

* Removed debug warning that was accidentally left in

* loginSound is off by default, and fixed toggle not working

* Prevent login sound from playing in the same session

---------

Co-authored-by: Iris <iris@raidev.eu>

quickshell/Common/settings/SettingsSpec.js

@@ -242,6 +242,7 @@ var SPEC = {
 
     soundsEnabled: { def: true },
     useSystemSoundTheme: { def: false },
+    soundLogin: { def: false },
     soundNewNotification: { def: true },
     soundVolumeChanged: { def: true },
     soundPluggedIn: { def: true },