add app

app/src/primitives/Timeline.ts

@@ -0,0 +1,14 @@
+import { z } from "zod";
+import { AnimatedEntities } from "./AnimatedEntities";
+
+export const RenderState = z.object({
+  curr_frame: z.number(),
+});
+
+export const Timeline = z.object({
+  entities: AnimatedEntities,
+  render_state: RenderState,
+  duration: z.number(),
+  fps: z.number().int(),
+  size: z.array(z.number().int()).length(2),
+});