feat: Added penMode for palm rejection (#4657)

Co-authored-by: dwelle <luzar.david@gmail.com>

src/types.ts

@@ -79,6 +79,8 @@ export type AppState = {
   editingLinearElement: LinearElementEditor | null;
   elementType: typeof SHAPES[number]["value"];
   elementLocked: boolean;
+  penMode: boolean;
+  penDetected: boolean;
   exportBackground: boolean;
   exportEmbedScene: boolean;
   exportWithDarkMode: boolean;