feat: Increase free shipping threshold from 3000 to 10000 RSD

Update free shipping minimum from 3,000 RSD to 10,000 RSD across:
- TickerBar component
- English translations (en.json)
- Serbian translations (sr.json)
- French translations (fr.json)
- German translations (de.json)

src/i18n/messages/en.json

@@ -16,7 +16,7 @@
       "ctaButton": "Transform My Hair & Skin",
       "learnStory": "Learn Our Story",
       "moneyBack": "30-Day Money Back",
-      "freeShipping": "Free Shipping Over 3,000 RSD",
+      "freeShipping": "Free Shipping Over 10,000 RSD",
       "crueltyFree": "Cruelty Free"
     },
     "collection": "Our Collection",
@@ -229,7 +229,7 @@
     "naturalIngredients": "Natural Ingredients",
     "noAdditives": "No additives",
     "freeShipping": "Free Shipping",
-    "ordersOver": "Orders over 3,000 RSD"
+    "ordersOver": "Orders over 10,000 RSD"
   },
   "ProblemSection": {
     "title": "The Problem",
@@ -324,7 +324,7 @@
     "qty": "Qty",
     "adding": "Adding...",
     "transformHairSkin": "Transform My Hair & Skin",
-    "freeShipping": "Free shipping on orders over 3,000 RSD",
+    "freeShipping": "Free shipping on orders over 10,000 RSD",
     "guarantee": "30-Day Guarantee",
     "secureCheckout": "Secure Checkout",
     "easyReturns": "Easy Returns",