feat(mobile): Added "jump to date" functionality to the memory view (#7323)

* implemented jump to date from memory

* Changed implementation to a ValueNotifier & fixes

* remove debug code

* feat(mobile):
- Added index bound checks
- Handled edge cases when scrolling to the very bottom of the grid-view
- removing the listener on dispose

* feat(mobile): fixed debug index offset & added debug toast for scroll errors

* feat(mobile): added more debug toasts...

* feat(mobile): scroll to month, if timeline is not grouped by days

---------

Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

mobile/lib/modules/asset_viewer/providers/scroll_to_date_notifier.provider.dart

@@ -0,0 +1,14 @@
+import 'package:flutter/material.dart';
+
+final scrollToDateNotifierProvider = ScrollToDateNotifier(null);
+
+class ScrollToDateNotifier extends ValueNotifier<DateTime?> {
+  ScrollToDateNotifier(super.value);
+
+  void scrollToDate(DateTime date) {
+    value = date;
+
+    // Manually notify listeners to trigger the scroll, even if the value hasn't changed
+    notifyListeners();
+  }
+}