Add Chrome extension and Windows native host

extension/config.js

@@ -0,0 +1,7 @@
+// Copy/edit locally after unpacking the extension. Do not commit a real token.
+export const CONFIG = {
+  // Example: "https://history.example.com/v1/visits"
+  collectorUrl: "",
+  apiToken: "",
+  deviceId: "windows-chrome"
+};