add manifest basic

Author: ThinkSalat

Diff for: manifest.json

@@ -0,0 +1,12 @@
+{
+  "manifest_version": 3,
+  "name": "Advanced Google Search",
+  "version": "1.0",
+  "description": "Makes the advanced search capabilities easily available on the toolbar",
+  "icons": {
+    "16": "images/icon-16.png",
+    "32": "images/icon-32.png",
+    "48": "images/icon-48.png",
+    "128": "images/icon-128.png"
+  }
+}