Added bottom sheet example app (#64)

bottom_sheet/lib/main.dart

@@ -0,0 +1,22 @@
+import 'package:flutter/material.dart';
+import 'package:project/home.dart';
+
+void main() {
+  runApp(MyApp());
+}
+
+class MyApp extends StatelessWidget {
+  // This widget is the root of your application.
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Bottom Sheet',
+      theme: ThemeData(
+        primarySwatch: Colors.red,
+        visualDensity: VisualDensity.adaptivePlatformDensity,
+      ),
+      home: MyHomePage(title: 'Bottom Sheet'),
+    );
+  }
+}
+