Add colors in Rust (#78)

* 🎨 Add colors in Rust

* 🌿 Use an option for the properties and #[repr(C)]

* ❌ Remove WASM dependency on document.

* 😎 Wrap Fill and stroke in a style struct.

* 📦 Use crate::Color

* Merge Add transactions for temporary modifications to the document

* Run cargo fmt

* Color without a 'U'

core/document/src/layers/shape.rs

@@ -0,0 +1,25 @@
+use crate::shape_points;
+
+use super::style;
+use super::LayerData;
+
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub struct Shape {
+	shape: shape_points::ShapePoints,
+	style: style::PathStyle,
+}
+
+impl Shape {
+	pub fn new(center: impl Into<kurbo::Point>, extent: impl Into<kurbo::Vec2>, sides: u8, style: style::PathStyle) -> Shape {
+		Shape {
+			shape: shape_points::ShapePoints::new(center, extent, sides),
+			style,
+		}
+	}
+}
+
+impl LayerData for Shape {
+	fn render(&self) -> String {
+		format!(r#"<polygon points="{}" {} />"#, self.shape, self.style.render(),)
+	}
+}