Lock the cursor to the window for first person camera

examples/core/3d_camera_first_person.zig

@@ -41,6 +41,7 @@ pub fn main() anyerror!void {
     }
 
     rl.setTargetFPS(60); // Set our game to run at 60 frames-per-second
+    rl.disableCursor(); // Lock the cursor to the window
     //--------------------------------------------------------------------------------------
 
     // Main game loop