Add repository link and deployment date to the application footer

Add footer to the layout component including a GitHub repository link and the deployment date.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 55837015-10e9-4be9-b857-7f5e6be73772
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: bd220250-ca9d-493a-9972-765935ee3c77
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/1cc377db-7ea0-49f2-97ce-c3e87e0228cc/55837015-10e9-4be9-b857-7f5e6be73772/CzGezQ7
Replit-Helium-Checkpoint-Created: true

artifacts/cra-app/src/components/layout/layout.tsx

@@ -1,4 +1,8 @@
 import { AppSidebar } from "./sidebar";
+import { Github } from "lucide-react";
+
+const REPO_URL = "https://github.com/sylvainp/cra-app";
+const DEPLOY_DATE = "14 avril 2025";
 
 export function AppLayout({ children }: { children: React.ReactNode }) {
   return (
@@ -8,6 +12,18 @@ export function AppLayout({ children }: { children: React.ReactNode }) {
         <div className="flex-1 p-8 container mx-auto max-w-7xl">
           {children}
         </div>
+        <footer className="shrink-0 border-t px-8 py-3 flex items-center justify-between text-xs text-muted-foreground">
+          <a
+            href={REPO_URL}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="flex items-center gap-1.5 hover:text-foreground transition-colors"
+          >
+            <Github className="h-3.5 w-3.5" />
+            Repo GitHub
+          </a>
+          <span>Déployé le {DEPLOY_DATE}</span>
+        </footer>
       </main>
     </div>
   );