feat(billing): add required messages

apps/web/src/locales/en/messages.json

@@ -11494,5 +11494,29 @@
   },
   "seamlessIntegration": {
     "message": "Seamless integration"
+  },
+  "families": {
+    "message": "Families"
+  },
+  "upgradeToFamilies": {
+    "message": "Upgrade to Families"
+  },
+  "upgradeToPremium": {
+    "message": "Upgrade to Premium"
+  },
+  "familiesUpdated": {
+    "message": "You've upgraded to Families!"
+  },
+  "taxCalculationError": {
+    "message": "There was an error calculating tax for your location. Please try again."
+  },
+  "individualUpgradeWelcomeMessage": {
+    "message": "Welcome to Bitwarden"
+  },
+  "individualUpgradeDescriptionMessage": {
+    "message": "Stay with Free, or go further with Premium or Families"
+  },
+  "individualUpgradeTaxInformationMessage": {
+    "message": "Prices exclude tax and are billed annually."
   }
 }