Added C# and C++ code to match with GDScript and tutorial on Your first 2D game page.

[sbalia]

The issue with C# and C++ versions is that they don't have random initialization in the ready function as GDScript has.

Link to the documentation: https://docs.godotengine.org/en/stable/getting_started/first_2d_game/05.the_main_game_scene.html#testing-the-scene