feat: add rate limiting for CoinGecko API and global error handling

locales/de.json

@@ -30,6 +30,11 @@
     "loading": "Laden...",
     "error": "Fehler beim Laden"
   },
+  "error": {
+    "title": "Etwas ist schiefgelaufen",
+    "retry": "Erneut versuchen",
+    "offline": "Keine Internetverbindung"
+  },
   "categories": {
     "electronics": "Elektronik",
     "furniture": "Möbel",

locales/en.json

@@ -30,6 +30,11 @@
     "loading": "Loading...",
     "error": "Error loading"
   },
+  "error": {
+    "title": "Something went wrong",
+    "retry": "Try again",
+    "offline": "No internet connection"
+  },
   "categories": {
     "electronics": "Electronics",
     "furniture": "Furniture",

locales/fr.json

@@ -30,6 +30,11 @@
     "loading": "Chargement...",
     "error": "Erreur de chargement"
   },
+  "error": {
+    "title": "Une erreur est survenue",
+    "retry": "Réessayer",
+    "offline": "Pas de connexion internet"
+  },
   "categories": {
     "electronics": "Électronique",
     "furniture": "Meubles",