Tanta Simulator

Added a lot of new features. Visually, there aren't many changes – heroes are now on the sides, I added a menu to display articles on right-click, and implemented the ability to cast spells with animation (although the effect isn't active yet), and added a loading screen. But in reality, this is a breakthrough; a huge amount of work has been done under the hood, and now all that remains is to implement the logic. I uploaded it because I wanted to check if it works. It seems to be working.