Modify all message enum data to use named struct values, not tuples (#479)

* Massively reorganize and clean up the whole Rust codebase

* Modify all message enum data to use named struct values, not tuples

editor/src/document/movement_message.rs

@@ -26,12 +26,20 @@ pub enum MovementMessage {
 		zoom_from_viewport: Option<DVec2>,
 	},
 	RotateCanvasBegin,
-	SetCanvasRotation(f64),
-	SetCanvasZoom(f64),
+	SetCanvasRotation {
+		angle_radians: f64,
+	},
+	SetCanvasZoom {
+		zoom_factor: f64,
+	},
 	TransformCanvasEnd,
-	TranslateCanvas(DVec2),
+	TranslateCanvas {
+		delta: DVec2,
+	},
 	TranslateCanvasBegin,
-	TranslateCanvasByViewportFraction(DVec2),
+	TranslateCanvasByViewportFraction {
+		delta: DVec2,
+	},
 	WheelCanvasTranslate {
 		use_y_as_x: bool,
 	},