Fix github stars endpoint (#5301)

- Encapsulated GitHub star response in an object
- Fixed rounding of Github stars to align with Github convention
- Fixed CORS issue so that endpoint can be called from twenty.com and
app.twenty.com

Co-authored-by: Ady Beraud <a.beraud96@gmail.com>

packages/twenty-website/src/app/api/github-stars/route.tsx

@@ -13,11 +13,11 @@ export async function GET() {
       desc(githubStarsModel.timestamp),
     );
 
-    const formattedGithubNumberOfStars = formatNumberOfStars(
+    const githubNumberOfStars = formatNumberOfStars(
       githubStars[0].numberOfStars,
     );
 
-    return Response.json(formattedGithubNumberOfStars);
+    return Response.json({ githubNumberOfStars });
   } catch (error: any) {
     return new Response(`Github stars error: ${error?.message}`, {
       status: 500,