✨(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/src/components/Button/index.stories.tsx

@@ -7,7 +7,9 @@ export default {
   component: Button,
 } as ComponentMeta<typeof Button>;
 
-const Template: ComponentStory<typeof Button> = () => <Button />;
+const Template: ComponentStory<typeof Button> = (args) => <Button {...args} />;
 
 export const Default = Template.bind({});
-Default.args = {};
+Default.args = {
+  children: "Amazing button",
+};