Added login screen and Tree page screen to test graph view package

lib/pages/home/bloc/home_state.dart

@@ -0,0 +1,26 @@
+import 'package:equatable/equatable.dart';
+import 'package:graphview/GraphView.dart';
+
+abstract class HomeState extends Equatable {
+  const HomeState();
+
+  @override
+  List<Object> get props => [];
+}
+
+class HomeInitial extends HomeState {}
+
+class HomeCounterState extends HomeState {
+  final int counter;
+  const HomeCounterState(this.counter);
+}
+
+class HomeUpdateTree extends HomeState {
+  final Graph graph;
+  final BuchheimWalkerConfiguration builder;
+
+  const HomeUpdateTree({required this.graph, required this.builder});
+
+  @override
+  List<Object> get props => [graph, builder];
+}