Added shape drawing and more vector helper functions

src/helpers/shared.js

@@ -34,3 +34,11 @@ export function snapPositionToGrid(position, gridSize) {
     y: roundTo(position.y, gridSize.y),
   };
 }
+
+export function toRadians(angle) {
+  return angle * (Math.PI / 180);
+}
+
+export function toDegrees(angle) {
+  return angle * (180 / Math.PI);
+}