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/settings/Processes.qml

@@ -48,7 +48,7 @@ Singleton {
     }
 
     property var fprintdDetectionProcess: Process {
-        command: ["sh", "-c", "command -v fprintd-list >/dev/null 2>&1"]
+        command: ["sh", "-c", "command -v fprintd-list >/dev/null 2>&1 && fprintd-list \"${USER:-$(id -un)}\" >/dev/null 2>&1"]
         running: false
         onExited: function (exitCode) {
             if (!settingsRoot)