fix(editor): handle invalid points on restore (#11321)

* fix: handle invalid points on restore

* move isValidPoint to @excalidraw/math

packages/math/src/point.ts

@@ -1,5 +1,5 @@
 import { degreesToRadians } from "./angle";
-import { PRECISION } from "./utils";
+import { isFiniteNumber, PRECISION } from "./utils";
 import { vectorFromPoint, vectorScale } from "./vector";
 
 import type {
@@ -253,3 +253,12 @@ export const isPointWithinBounds = <P extends GlobalPoint | LocalPoint>(
     q[1] >= Math.min(p[1], r[1])
   );
 };
+
+export const isValidPoint = (point: unknown): point is LocalPoint => {
+  return (
+    Array.isArray(point) &&
+    point.length === 2 &&
+    isFiniteNumber(point[0]) &&
+    isFiniteNumber(point[1])
+  );
+};