Unify examples structure (#1118)

* Animations, CameraAndViewport, CollisionDetection and Components unified

* Added descriptions to effects

* Rename input games

* Unify input stories

* Add info to parallax section

* Added descriptions to the rendering examples

* Add descriptions to the sprites directory

* Fix utils and rendering section

* Add descriptions to the widgets section

* Delete directory that rebase brought back

* Unify game names

* Added some styleguide docs for examples

* Fix analyze issues

* All files should have _example as suffix

* Made the FollowComponentExample a bit easier to understand

* Change priority of ember

examples/lib/stories/collision_detection/collision_detection.dart

@@ -2,35 +2,36 @@ import 'package:dashbook/dashbook.dart';
 import 'package:flame/game.dart';
 
 import '../../commons/commons.dart';
-import 'circles.dart';
-import 'collidable_animation.dart';
-import 'multiple_shapes.dart';
-import 'simple_shapes.dart';
+import 'circles_example.dart';
+import 'collidable_animation_example.dart';
+import 'multiple_shapes_example.dart';
+import 'simple_shapes_example.dart';
 
 void addCollisionDetectionStories(Dashbook dashbook) {
   dashbook.storiesOf('Collision Detection')
     ..add(
       'Collidable AnimationComponent',
       (_) => GameWidget(game: CollidableAnimationExample()),
-      codeLink: baseLink('collision_detection/collidable_animation.dart'),
+      codeLink:
+          baseLink('collision_detection/collidable_animation_example.dart'),
       info: CollidableAnimationExample.description,
     )
     ..add(
       'Circles',
       (_) => GameWidget(game: CirclesExample()),
-      codeLink: baseLink('collision_detection/circles.dart'),
+      codeLink: baseLink('collision_detection/circles_example.dart'),
       info: CirclesExample.description,
     )
     ..add(
       'Multiple shapes',
       (_) => GameWidget(game: MultipleShapesExample()),
-      codeLink: baseLink('collision_detection/multiple_shapes.dart'),
+      codeLink: baseLink('collision_detection/multiple_shapes_example.dart'),
       info: MultipleShapesExample.description,
     )
     ..add(
       'Simple Shapes',
       (_) => GameWidget(game: SimpleShapesExample()),
-      codeLink: baseLink('collision_detection/simple_shapes.dart'),
+      codeLink: baseLink('collision_detection/simple_shapes_example.dart'),
       info: SimpleShapesExample.description,
     );
 }

examples/lib/stories/collision_detection/simple_shapes_example.dart

@@ -17,6 +17,7 @@ class SimpleShapesExample extends FlameGame with HasTappables {
     tap on an already existing shape it will remove that shape and replace it
     with a new one.
   ''';
+
   final _rng = Random();
 
   MyShapeComponent randomShape(Vector2 position) {