docs(example): add arc3d example to 3d_gizmos

Authored-by: RobWalt <robwalter96@gmail.com>

examples/3d/3d_gizmos.rs

@@ -163,7 +163,20 @@ fn system(
     }
 
     my_gizmos
-        .long_arc_3d_between(Vec3::ZERO, Vec3::ONE, Vec3::NEG_X + Vec3::Y + Vec3::Z)
+        .long_arc_3d_between(
+            Vec3::ZERO,
+            Vec3::ONE,
+            Vec3::X * time.elapsed_seconds().cos() + Vec3::Y + Vec3::Z,
+        )
+        .radius(time.elapsed_seconds().sin().abs())
+        .color(Color::ORANGE);
+
+    my_gizmos
+        .arc_3d((time.elapsed_seconds().sin() + 1.0) * std::f32::consts::PI)
+        .radius(0.2)
+        .center(Vec3::ONE)
+        .rotation(Quat::from_rotation_arc(Vec3::Y, Vec3::ONE.normalize()))
+        .segments(10)
         .color(Color::ORANGE);
 
     // Circles have 32 line-segments by default.