Add a keybind to hide all GUIs whilst on team

[TheGreenLego_Brick]

Cinematic Mode

When you press F3 or something it hides the mouse, guis, and core guis. It could also be setup to hide everyone’s name. This would be helpful for photography and videography in county. When it’s enabled, a hint could appear for a few seconds explaining how to disable it (“Press F3 to disable cinematic mode”)