Adds skeleton widget for displayign notifications

lib/widget/notifications.dart

@@ -0,0 +1,57 @@
+
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+import 'package:inventree/widget/refreshable_state.dart';
+
+class NotificationWidget extends StatefulWidget {
+
+  @override
+  _NotificationState createState() => _NotificationState();
+
+}
+
+
+class _NotificationState extends RefreshableState<NotificationWidget> {
+
+  _NotificationState() : super();
+
+  @override
+  AppBar? buildAppBar(BuildContext context) {
+    // No app bar for the notification widget
+    return null;
+  }
+
+  @override
+  Future<void> request (BuildContext context) async {
+    print("requesting notifications!");
+  }
+
+  List<Widget> renderNotifications(BuildContext context) {
+
+    List<Widget> tiles = [];
+
+    tiles.add(
+      ListTile(
+        title: Text("Not"),
+        subtitle: Text("subtitle yatyayaya"),
+      )
+    );
+
+    return tiles;
+
+  }
+
+  @override
+  Widget getBody(BuildContext context) {
+    return Center(
+      child: ListView(
+        children: ListTile.divideTiles(
+          context: context,
+          tiles: renderNotifications(context),
+        ).toList()
+      )
+    );
+  }
+
+}