This re-ports the following demos to Godot 4 following their latest `3.x` versions:
- 2D Navigation with AStarGrid2D
- 2D JRPG Demo
- 2D Isometric Game
- 2D Platformer
Some tweaks have also been made in the process, such as split screen players
having different colors in the 2D Platformer demo.
Co-authored-by: Nonparoxysmic <69494951+Nonparoxysmic@users.noreply.github.com>
