fix: update manifest to include background.js

Signed-off-by: Aransiola Ayodele <[email protected]>

Author: CodeLeom

manifest.json

@@ -3,20 +3,12 @@
     "name": "Code Diff Checker",
     "version": "1.0",
     "description": "A simple code or text diff checker that highlights the differences between two text inputs.",
-    "action": {
-      "default_popup": "index.html",
-      "default_title": "Open Diff Checker"
+    "background": {
+      "service_worker": "background.js"
     },
-    "permissions": [],
+    "permissions": ["tabs"],
     "icons": {
       "48": "icon48.png",
       "128": "icon128.png"
-    },
-    "content_scripts": [
-      {
-        "matches": ["<all_urls>"],
-        "js": ["dist/bundle.js"],
-        "css": ["src/styles.css"]
-      }
-    ]
+    }
   }