feat: rework account management page, add tooltip to settings

lib/features/settings/view/pages/security_settings_page.dart

@@ -8,7 +8,19 @@ class SecuritySettingsPage extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(title: Text(S.of(context)!.security)),
+      appBar: AppBar(
+        title: Text(S.of(context)!.security),
+        actions: [
+          Padding(
+            padding: const EdgeInsets.all(16.0),
+            child: Tooltip(
+              triggerMode: TooltipTriggerMode.tap,
+              message: "These settings apply to the current user only", //TODO: INTL
+              child: Icon(Icons.info_outline),
+            ),
+          ),
+        ],
+      ),
       body: ListView(
         children: const [
           BiometricAuthenticationSetting(),