✨(react) add button sizes

Add two sizes for the Button component: small and medium. They
are present on the new delivered sketches concerning pagination
but dont exists yet.

packages/react/src/components/Button/index.spec.tsx

@@ -1,7 +1,7 @@
 import { act, render, screen, waitFor } from "@testing-library/react";
 import React from "react";
-import { buildTheme, loadTokens } from "tests/Theme";
 import userEvent from "@testing-library/user-event";
+import { buildTheme, loadTokens } from "tests/Theme";
 import { Button } from "./index";
 
 describe("<Button/>", () => {