Added new apps to my OS!

I’ve added a file viewer and terminal app to my operating system!

What’s new?

• Window dragging finally works!
• Windows are able to move to the front!

Problems I’ve faced

I had issues making a window come to the front when clicked or move. Initially, I was using .style.zIndex++, but it did not seem to work when a window was clicked multiple times. To solve this, I changed all the z-index of all windows when one is clicked, to ensure all of the values sync.

The buttons on the top bar are currently text-based, so I’ll be creating icons for them, and to declutter the buttons top bar on apps.