🏷️(react) export DefaultToken types and defaultTokens variable

By doing this we provide more typings for consumers which makes more
handy the use of the local configuration in cunningham.ts files.

.changeset/giant-drinks-battle.md

@@ -0,0 +1,5 @@
+---
+"@openfun/cunningham-react": minor
+---
+
+export DefaultToken types and defaultTokens variable

apps/demo/cunningham.ts

@@ -1,4 +1,6 @@
-export default {
+import { DefaultTokens } from "@openfun/cunningham-react";
+
+const config: DefaultTokens = {
   theme: {
     colors: {
       "primary-500": "purple",
@@ -10,3 +12,5 @@ export default {
     },
   },
 };
+
+export default config;

packages/react/src/index.ts

@@ -1,4 +1,6 @@
 import "./index.scss";
+import { PartialNested } from ":/types";
+import { tokens } from "./cunningham-tokens";
 
 export * from "./components/Button";
 export * from "./components/DataGrid";
@@ -12,3 +14,6 @@ export * from "./components/Forms/Select";
 export * from "./components/Loader";
 export * from "./components/Pagination";
 export * from "./components/Provider";
+
+export type DefaultTokens = PartialNested<typeof tokens>;
+export const defaultTokens = tokens;