fix: allow to start new game once completed

The n key did not work after the game is complete. This is why...

Why does AI make these obvious problems?

components/klondike-solitaire.tsx

@@ -142,9 +142,10 @@ export function KlondikeSolitaireComponent() {
   };
 
   const handleKeyPress = (e: React.KeyboardEvent) => {
-    if (gameWon) return;
+    const keyPressed = e.key.toLowerCase();
+    if (gameWon && keyPressed != 'n') return;
 
-    switch (e.key.toLowerCase()) {
+    switch (keyPressed) {
       case 'd':
         drawCards();
         break;
@@ -255,4 +256,4 @@ export function KlondikeSolitaireComponent() {
       </CardContent>
     </CardGame>
   );
-}
+}