n:m attribute–evidence guide lines from card right to field left.

Overlay draws all links for the selected attribute or evidence; optional
binder context preserves unit tests without BinderProvider.

src/index.ts

@@ -9,5 +9,5 @@ export type {
   FormRendererProps,
   FormSchema,
 } from "./FormRenderer";
-export { BinderProvider, useBinder } from "./BinderProvider";
+export { BinderProvider, useBinder, useBinderOptional } from "./BinderProvider";
 export type { BinderServices, BinderProviderProps } from "./BinderProvider";