Migrate examples back, change to monorepo (#701)

examples/lib/stories/animations/basic.dart

@@ -0,0 +1,71 @@
+import 'dart:ui';
+
+import 'package:flame/components.dart';
+import 'package:flame/game.dart';
+import 'package:flame/gestures.dart';
+import 'package:flutter/gestures.dart' show TapDownDetails;
+
+class BasicAnimations extends BaseGame with TapDetector {
+  Image chopper;
+  Image creature;
+  SpriteAnimation animation;
+
+  @override
+  Future<void> onLoad() async {
+    chopper = await images.load('animations/chopper.png');
+    creature = await images.load('animations/creature.png');
+
+    animation = SpriteAnimation.fromFrameData(
+      chopper,
+      SpriteAnimationData.sequenced(
+        amount: 4,
+        textureSize: Vector2.all(48),
+        stepTime: 0.15,
+      ),
+    );
+
+    final spriteSize = Vector2.all(100.0);
+    final animationComponent2 = SpriteAnimationComponent(
+      animation: animation,
+      size: spriteSize,
+    );
+    animationComponent2.x = size.x / 2 - spriteSize.x;
+    animationComponent2.y = spriteSize.y;
+
+    final reversedAnimationComponent = SpriteAnimationComponent(
+      animation: animation.reversed(),
+      size: spriteSize,
+    );
+    reversedAnimationComponent.x = size.x / 2;
+    reversedAnimationComponent.y = spriteSize.y;
+
+    add(animationComponent2);
+    add(reversedAnimationComponent);
+  }
+
+  void addAnimation(Vector2 position) {
+    final size = Vector2(291, 178);
+
+    final animationComponent = SpriteAnimationComponent.fromFrameData(
+      creature,
+      SpriteAnimationData.sequenced(
+        amount: 18,
+        amountPerRow: 10,
+        textureSize: size,
+        stepTime: 0.15,
+        loop: false,
+      ),
+      size: size,
+      removeOnFinish: true,
+    );
+
+    animationComponent.position = position;
+    animationComponent.position = animationComponent.position - size / 2;
+    add(animationComponent);
+  }
+
+  @override
+  void onTapDown(TapDownDetails evt) {
+    addAnimation(Vector2(evt.globalPosition.dx, evt.globalPosition.dy));
+  }
+}