✨(react) add tokens.ts files handling

These files will be used to define the custom design tokens per components.
They are automatically aggregated by the packages/react/cunningham.ts file,
this is why handling typescript config file was important.

packages/react/.storybook/main.cjs

@@ -1,3 +1,8 @@
+const viteTsconfig = require('vite-tsconfig-paths');
+const tsconfigPaths = viteTsconfig.default;
+
+const { mergeConfig } = require('vite');
+
 module.exports = {
   "stories": [
     "../src/**/*.stories.mdx",
@@ -18,5 +23,10 @@ module.exports = {
   ],
   "features": {
     "storyStoreV7": true
-  }
+  },
+  async viteFinal(config) {
+    return mergeConfig(config, {
+      plugins: [tsconfigPaths()],
+    });
+  },
 }