INFRA: Set Up Project.

lib/widget/firebase_pagination/firebase_pagination.dart

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+/// A package to paginate your firebase related data with realtime updates.
+///
+/// It can be used for `Firestore` and `Firebase Realtime Database`.
+///
+/// Data can be shown in `list`, `grid` and `scrollable wrap` view.
+library;
+
+export 'src/firestore_pagination.dart';
+// Data Models
+export 'src/models/view_type.dart';
+export 'src/models/wrap_options.dart';
+// Widgets
+export 'src/realtime_db_pagination.dart';