greeter: New Greeter Settings UI & Sync fixes

- Add PAM Auth via GUI
- Added new sync flags
- Refactored cache directory management & many others
- Fix for wireplumber permissions
- Fix for polkit auth w/icon
- Add pam_fprintd timeout=5 to prevent 30s auth blocks when using password

quickshell/Common/SettingsData.qml

@@ -296,6 +296,15 @@ Singleton {
     property string lockDateFormat: ""
     property bool greeterRememberLastSession: true
     property bool greeterRememberLastUser: true
+    property bool greeterEnableFprint: false
+    property bool greeterEnableU2f: false
+    property string greeterWallpaperPath: ""
+    property bool greeterUse24HourClock: true
+    property bool greeterShowSeconds: false
+    property bool greeterPadHours12Hour: false
+    property string greeterLockDateFormat: ""
+    property string greeterFontFamily: ""
+    property string greeterWallpaperFillMode: ""
     property int mediaSize: 1
 
     property string appLauncherViewMode: "list"