Add VS Marketplace download badges to README

- Add AIEngineeringFluency downloads badge next to the build badge
- Add copilot-token-tracker downloads badge in the VS Code Extension section

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: rajbos

README.md

@@ -5,6 +5,7 @@
 Track your GitHub Copilot token usage and AI Fluency across VS Code, Visual Studio, and the command line. All data is read from local session logs — nothing leaves your machine unless you opt in to cloud sync.
 
 [![Build](https://github.com/rajbos/github-copilot-token-usage/actions/workflows/build.yml/badge.svg)](https://github.com/rajbos/github-copilot-token-usage/actions/workflows/build.yml)
+[![Visual Studio Marketplace Downloads](https://img.shields.io/visual-studio-marketplace/d/RobBos.AIEngineeringFluency)](https://marketplace.visualstudio.com/items?itemName=RobBos.AIEngineeringFluency)
 
 ## Supported AI engineering tools
 
@@ -25,6 +26,8 @@ Track your GitHub Copilot token usage and AI Fluency across VS Code, Visual Stud
 
 Real-time token usage in the status bar, fluency score dashboard, usage analysis, cloud sync, and more.
 
+[![Visual Studio Marketplace Downloads](https://img.shields.io/visual-studio-marketplace/d/RobBos.copilot-token-tracker)](https://marketplace.visualstudio.com/items?itemName=RobBos.copilot-token-tracker)
+
 ```bash
 # Install from the VS Code Marketplace
 ext install RobBos.copilot-token-tracker