Add actual translatable strings

src/main/resources/lang/en-GB/default.json

@@ -1,27 +1,5 @@
 {
-  "extensionName": {
-    "message": "Notify link clicks i18n",
-    "description": "Name of the extension."
-  },
-
-  "extensionDescription": {
-    "message": "Shows a notification when the user clicks on links.",
-    "description": "Description of the extension."
-  },
-
-  "notificationTitle": {
-    "message": "Click notification",
-    "description": "Title of the click notification."
-  },
-
-  "notificationContent": {
-    "message": "You clicked $URL$.",
-    "description": "Tells the user which link they clicked.",
-    "placeholders": {
-      "url" : {
-        "content" : "$1",
-        "example" : "https://developer.mozilla.org"
-      }
-    }
-  }
+  "discovered_on": "&7Discovered on: %0",
+  "discovered_title": "&d%0 discovered!",
+  "discovered_subtitle": "&fKeep exploring to discover more!"
 }