example: add rpg assets for use in examples (maybe pair this down in the future)

Author: cart

assets/textures/character_run.png assets/textures/rpg/chars/gabe/gabe-idle-run.png

@@ -29,7 +29,7 @@ fn setup(
 ) {
     env_logger::init();
     let texture_handle = asset_server
-        .load_sync(&mut textures, "assets/textures/character_run.png")
+        .load_sync(&mut textures, "assets/textures/rpg/chars/gabe/gabe-idle-run.png")
         .unwrap();
     let texture = textures.get(&texture_handle).unwrap();
     let sprite_sheet = SpriteSheet::from_grid(texture_handle, texture.size, 7, 1);