feat: add slot game artwork assets for fruit-frenzy and liberty-belle

- Add sprite images for Liberty Belle slot game (bell, diamond, heart, horseshoe, spade, star)
- Add sprite images for Fruit Frenzy slot game (bell, cherry, lemon, melon, orange, plum)
- Update slots-artwork.json to reference the new image assets

public/data/slots-artwork.json

@@ -9,32 +9,32 @@
     {
       "id": "liberty-belle-spade",
       "key": "slots-liberty-belle-spade",
-      "path": null
+      "path": "/assets/images/slots/liberty-belle/spade.png"
     },
     {
       "id": "liberty-belle-diamond",
       "key": "slots-liberty-belle-diamond",
-      "path": null
+      "path": "/assets/images/slots/liberty-belle/diamond.png"
     },
     {
       "id": "liberty-belle-star",
       "key": "slots-liberty-belle-star",
-      "path": null
+      "path": "/assets/images/slots/liberty-belle/star.png"
     },
     {
       "id": "liberty-belle-heart",
       "key": "slots-liberty-belle-heart",
-      "path": null
+      "path": "/assets/images/slots/liberty-belle/heart.png"
     },
     {
       "id": "liberty-belle-horseshoe",
       "key": "slots-liberty-belle-horseshoe",
-      "path": null
+      "path": "/assets/images/slots/liberty-belle/horseshoe.png"
     },
     {
       "id": "liberty-belle-bell",
       "key": "slots-liberty-belle-bell",
-      "path": null
+      "path": "/assets/images/slots/liberty-belle/bell.png"
     },
     {
       "id": "liberty-belle-cabinet",
@@ -49,32 +49,32 @@
     {
       "id": "fruit-frenzy-cherry",
       "key": "slots-fruit-frenzy-cherry",
-      "path": null
+      "path": "/assets/images/slots/fruit-frenzy/cherry.png"
     },
     {
       "id": "fruit-frenzy-lemon",
       "key": "slots-fruit-frenzy-lemon",
-      "path": null
+      "path": "/assets/images/slots/fruit-frenzy/lemon.png"
     },
     {
       "id": "fruit-frenzy-plum",
       "key": "slots-fruit-frenzy-plum",
-      "path": null
+      "path": "/assets/images/slots/fruit-frenzy/plum.png"
     },
     {
       "id": "fruit-frenzy-orange",
       "key": "slots-fruit-frenzy-orange",
-      "path": null
+      "path": "/assets/images/slots/fruit-frenzy/orange.png"
     },
     {
       "id": "fruit-frenzy-melon",
       "key": "slots-fruit-frenzy-melon",
-      "path": null
+      "path": "/assets/images/slots/fruit-frenzy/melon.png"
     },
     {
       "id": "fruit-frenzy-bell",
       "key": "slots-fruit-frenzy-bell",
-      "path": null
+      "path": "/assets/images/slots/fruit-frenzy/bell.png"
     },
     {
       "id": "fruit-frenzy-bar",