feat: add core domain model foundations

core/geometry.ts

@@ -0,0 +1,32 @@
+export type Vec2D = {
+  x: number;
+  y: number;
+};
+
+export type Size = {
+  w: number;
+  h: number;
+};
+
+export type Rect = Vec2D & Size;
+
+export type Bounds = Rect;
+
+export type Angle = number;
+
+export type Transform = {
+  position: Vec2D;
+  scale: Vec2D;
+  rotation: Angle;
+};
+
+export type Mat2D = {
+  a: number;
+  b: number;
+  c: number;
+  d: number;
+  tx: number;
+  ty: number;
+};
+
+export type CoordinateSpace = "document" | "artboard" | "viewport" | "layer";