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/mod.rs

@@ -0,0 +1,54 @@
+pub mod style;
+
+pub mod circle;
+pub use circle::Circle;
+
+pub mod line;
+pub use line::Line;
+
+pub mod rect;
+pub use rect::Rect;
+
+pub mod shape;
+pub use shape::Shape;
+
+pub mod folder;
+pub use folder::Folder;
+
+pub trait LayerData {
+	fn render(&self) -> String;
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub enum LayerDataTypes {
+	Folder(Folder),
+	Circle(Circle),
+	Rect(Rect),
+	Line(Line),
+	Shape(Shape),
+}
+
+impl LayerDataTypes {
+	pub fn render(&self) -> String {
+		match self {
+			Self::Folder(f) => f.render(),
+			Self::Circle(c) => c.render(),
+			Self::Rect(r) => r.render(),
+			Self::Line(l) => l.render(),
+			Self::Shape(s) => s.render(),
+		}
+	}
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct Layer {
+	pub visible: bool,
+	pub name: Option<String>,
+	pub data: LayerDataTypes,
+}
+
+impl Layer {
+	pub fn new(data: LayerDataTypes) -> Self {
+		Self { visible: true, name: None, data }
+	}
+}