✨(tokens) add TS generator and re-organize the repo

Add TS Generator which is a lot based on JS Generator.

apps/demo/src/main.tsx

@@ -2,12 +2,14 @@ import React from "react";
 import ReactDOM from "react-dom/client";
 import "./index.scss";
 import { Button } from "@openfun/cunningham-react";
+import { tokens } from "./cunningham-tokens";
 
 ReactDOM.createRoot(document.getElementById("root") as HTMLElement).render(
   <React.StrictMode>
     <div className="center">
       <h1 className="test">Cunningham Demo.</h1>
       <Button />
+      <h3>Primary color is {tokens.colors.primary}</h3>
     </div>
   </React.StrictMode>
 );