Fix polygon overflow (#644)

* changed polygon side to u32 + set max polygon side to 1000

* revert unnecessary change

* Include unwrap for vertices input

graphene/src/layers/shape_layer.rs

@@ -105,7 +105,7 @@ impl ShapeLayer {
 	///
 	/// # Panics
 	/// This function panics if `sides` is zero.
-	pub fn ngon(sides: u8, style: PathStyle) -> Self {
+	pub fn ngon(sides: u32, style: PathStyle) -> Self {
 		use std::f64::consts::{FRAC_PI_2, TAU};
 
 		fn unit_rotation(theta: f64) -> DVec2 {

graphene/src/operation.rs

@@ -95,7 +95,7 @@ pub enum Operation {
 		path: Vec<LayerId>,
 		insert_index: isize,
 		transform: [f64; 6],
-		sides: u8,
+		sides: u32,
 		style: style::PathStyle,
 	},
 	AddOverlayShape {