add Debug, Copy, Clone derives to Circle (bevyengine#6009)

# Objective

- all the shapes except Circle have derives for Debug, Copy, and Clone

## Solution

- add derive to Circle for Debug, Copy, and Clone

crates/bevy_render/src/mesh/shape/regular_polygon.rs

@@ -61,6 +61,7 @@ impl From<RegularPolygon> for Mesh {
 }
 
 /// A circle in the `XY` plane
+#[derive(Debug, Copy, Clone)]
 pub struct Circle {
     /// Inscribed radius in the `XY` plane.
     pub radius: f32,