Migrate examples back, change to monorepo (#701)

examples/lib/stories/utils/timer_component.dart

@@ -0,0 +1,31 @@
+import 'package:flutter/material.dart';
+import 'package:flame/game.dart';
+import 'package:flame/timer.dart';
+import 'package:flame/gestures.dart';
+
+class RenderedTimeComponent extends TimerComponent {
+  final TextConfig textConfig = TextConfig(color: const Color(0xFFFFFFFF));
+
+  RenderedTimeComponent(Timer timer) : super(timer);
+
+  @override
+  void render(Canvas canvas) {
+    textConfig.render(
+      canvas,
+      'Elapsed time: ${timer.current}',
+      Vector2(10, 150),
+    );
+  }
+}
+
+class TimerComponentGame extends BaseGame with TapDetector, DoubleTapDetector {
+  @override
+  void onTapDown(_) {
+    add(RenderedTimeComponent(Timer(1)..start()));
+  }
+
+  @override
+  void onDoubleTap() {
+    add(RenderedTimeComponent(Timer(5)..start()));
+  }
+}