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/nine_tile_box_example.dart

@@ -0,0 +1,23 @@
+import 'package:dashbook/dashbook.dart';
+import 'package:flame/widgets.dart';
+import 'package:flutter/widgets.dart';
+
+Widget nineTileBoxBuilder(DashbookContext ctx) {
+  return Container(
+    width: ctx.numberProperty('width', 200),
+    height: ctx.numberProperty('height', 200),
+    child: NineTileBox.asset(
+      path: 'nine-box.png',
+      tileSize: 8,
+      destTileSize: 50,
+      child: const Center(
+        child: Text(
+          'Cool label',
+          style: TextStyle(
+            color: Color(0xFF000000),
+          ),
+        ),
+      ),
+    ),
+  );
+}