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/widgets/sprite_button_example.dart

@@ -0,0 +1,27 @@
+import 'package:dashbook/dashbook.dart';
+import 'package:flame/extensions.dart';
+import 'package:flame/widgets.dart';
+import 'package:flutter/widgets.dart';
+
+Widget spriteButtonBuilder(DashbookContext ctx) {
+  return Container(
+    padding: const EdgeInsets.all(20),
+    child: SpriteButton.asset(
+      path: 'buttons.png',
+      pressedPath: 'buttons.png',
+      srcPosition: Vector2(0, 0),
+      srcSize: Vector2(60, 20),
+      pressedSrcPosition: Vector2(0, 20),
+      pressedSrcSize: Vector2(60, 20),
+      onPressed: () {
+        print('Pressed');
+      },
+      label: const Text(
+        'Sprite Button',
+        style: TextStyle(color: Color(0xFF5D275D)),
+      ),
+      width: ctx.numberProperty('width', 250),
+      height: ctx.numberProperty('height', 75),
+    ),
+  );
+}