P0-B4: Part 1233: Debugging, Improvements

I have added the ability for the player to create multiple characters with multiple character files.

This was possible on the server previously, but the persistent variables on the client were not instanced, they are now.

This will effectively replace a conventional save/load system: Instead of the player having separate saves, they can have separate characters. This should be more immersive, and create higher stakes for the players decisions, but still allow them to experience different parts of the game.

I have also made more minor changes and improvements to various systems within the game.