Update plugin tracking refs to unique identifiers

Changed generic ?ref=plugin to plugin-specific ?ref=plugin_{name} for better tracking and analytics.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: riderx

README.md

@@ -1,8 +1,8 @@
  <a href="https://capgo.app/"><img src='https://raw.githubusercontent.com/Cap-go/capgo/main/assets/capgo_banner.png' alt='Capgo - Instant updates for capacitor'/></a>
 
 <div align="center">
-  <h2><a href="https://capgo.app/?ref=plugin"> ➡️ Get Instant updates for your App with Capgo 🚀</a></h2>
-  <h2><a href="https://capgo.app/consulting/?ref=plugin"> Fix your annoying bug now, Hire a Capacitor expert 💪</a></h2>
+  <h2><a href="https://capgo.app/?ref=plugin_data_storage_sqlite"> ➡️ Get Instant updates for your App with Capgo 🚀</a></h2>
+  <h2><a href="https://capgo.app/consulting/?ref=plugin_data_storage_sqlite"> Fix your annoying bug now, Hire a Capacitor expert 💪</a></h2>
 </div>
 
 <p align="center"><br><img src="https://user-images.githubusercontent.com/236501/85893648-1c92e880-b7a8-11ea-926d-95355b8175c7.png" width="128" height="128" /></p>