Game as a Component (#906)

* Game as a component

* Fix component stories

* Effects are now components

* Update effects docs

* Handle swap of parent

* Fix reAddChildren

* Wait for children to be added

* BaseComponent and PositionComponent to be non-abstract

* Simplify HasGameRef

* Revert so that onLoad can be null

* Fix example description

* Effects as components

* Remove gameRef from addChildren

* Fix hasGameRef

* Start migrating effects

* Updated comments of effect fields

* Fix comments

* Continue to fix sequence and combined effects

* Upgrade ordered_set

* Fix position_component_test

* BaseComponent -> Component

* Fix combined and sequence effects

* Await components to be added in tests

* Remove unnecessary game.update in tests

* Fix some tests related to composition

* BaseGame should be used in examples

* Fix CombinedEffect test

* Keyboard code to be based on Component

* Fix keyboard tests

* Fix analyze problems

* Fix sequence_effect

* Fix combined_effect_test

* Store peak state instead of end state

* Fix sequence_effect tests

* Update tutorial

* Fix tutorial 1

* Remove SimplePositionComponentEffect

* Remove unused test variable

* Update docs

* Removed onMount

* Remove onMount

* Add missing dartdoc

* Fix dart docs

* Add super.update where needed

* Move reAddChildren to component

* Reorganize method order in game widget

* preOffset -> initialDelay, postOffset -> peakDelay

* Introduce component.onParentChange

* Remove tests in wrong file

* Fix composed component test

* Add game lifecycle test

* Use BaseGame for mouse cursor test

* Oxygen should (?) not call super.update

* Use BaseGame in keyboard_test

* Fix onLoad to be properly cached

* Re-add unintentionally removed override

* Fix info for collision detection tests

* Add test for correct lifecycle on parent change

* Fix particles example

* Add component lifecycle diagram to the docs

* Add docs for the game lifecycle

* onRemove should be called when a game is removed from the widget

* Fix analyze errors

* prepare should be called from the component itself, not its parent

* Fix dartdoc

* onParentChange -> onMount

* onMount should have void as return type

* Simplify the loaderFuture in GameWidget

* Fix mock_canvas

* Fix rebase problem

* Remove asComponent

* Less complex _loaderFuture

* Add super.update to no_fcs parallax example

* Fix async tests

* Revert _loaderFuture

* Fix analyze issues

* await gameWithCollidables

* Keep epsilon small where it can be

* tappable methods should return bool

* Game lifecycle is now the same as for Component

* Remove mustCallSuper from component.update

* Make onLoadCache protected

* @internal on onLoadCache

* Cache/Memoize debugPaint and debugTextPaint

* Fix imports

* Fix comments

* Always call super.onLoad so that mixins can override it

* Add forgotten super.onLoad

* Bump coverage percentage

* HasCollidables should override update

* Fix Game comments

* Fix some dartdoc

* Apply suggestions from code review

Co-authored-by: Erick <erickzanardoo@gmail.com>

* Game + Loadable as mixins

* Update packages/flame/lib/src/game/game_widget/game_widget.dart

Co-authored-by: Luan Nico <luanpotter27@gmail.com>

* Update loadable docs

* Fix comments

* Move fps_counter

* Fix keyboard example

* Fix dartdoc

* Remove tutorials temporarily

* Fix game lowlevel graph

* Fix resize issue

Co-authored-by: Erick <erickzanardoo@gmail.com>
Co-authored-by: Luan Nico <luanpotter27@gmail.com>

examples/lib/stories/sprites/basic.dart

@@ -1,9 +1,10 @@
 import 'package:flame/components.dart';
 import 'package:flame/game.dart';
 
-class BasicSpriteGame extends BaseGame {
+class BasicSpriteGame extends FlameGame {
   @override
   Future<void> onLoad() async {
+    await super.onLoad();
     final sprite = await loadSprite('flame.png');
     add(
       SpriteComponent(