* feat: included new assets * chore: update game assets loader * feat: allowed progressing sprite * feat(sanbox): updated games * feat: updated tests * feat: updated goldens * feat: renamed FlutterSignPost to SignPost * chore: updated goldens * chore: renamed story * refactor: removed caching * refactor: changed how Sprites are loaded * feat: made SignpostSpriteState visibleForTesting * refactor: rename SignPost to Signpost * chore: updated goldens * refactor: improved test name Co-authored-by: Allison Ryan <77211884+allisonryan0002@users.noreply.github.com> * docs: documented new Signpost functionality Co-authored-by: Allison Ryan <77211884+allisonryan0002@users.noreply.github.com> * docs: improved progress doc * feat: removed loop Co-authored-by: Allison Ryan <77211884+allisonryan0002@users.noreply.github.com>