Readded credits, added all open source projects used in credits, added achievements in sidebar as we seem to have enough space on a 1920x1080 screen for it

src/App.tsx

@@ -32,6 +32,7 @@ const Breakout = lazy(() => import("./pages/Breakout"));
 const Music = lazy(() => import("./pages/Music"));
 const AIChat = lazy(() => import("./pages/AIChat"));
 const Achievements = lazy(() => import("./pages/Achievements"));
+const Credits = lazy(() => import("./pages/Credits"));
 const NotFound = lazy(() => import("./pages/NotFound"));
 
 const queryClient = new QueryClient();
@@ -126,6 +127,7 @@ const AppContent = () => {
           <Route path="music" element={<Music />} />
           <Route path="ai" element={<AIChat />} />
           <Route path="achievements" element={<Achievements />} />
+          <Route path="credits" element={<Credits />} />
         </Route>
         <Route path="*" element={<NotFound />} />
       </Routes>