Update VS Code Marketplace docs to include Visual Studio extension links

Author: christianhelle

docs/VSCode.md

@@ -1,3 +1,7 @@
+[![buymeacoffee](https://img.shields.io/badge/buy%20me%20a%20coffee-donate-yellow.svg)](https://www.buymeacoffee.com/christianhelle)
+
+There is a separate VSIX installer available for **[Visual Studio 2022](https://marketplace.visualstudio.com/items?itemName=ChristianResmaHelle.ApiClientCodeGenerator2022)**, **[Visual Studio 2019](https://marketplace.visualstudio.com/items?itemName=ChristianResmaHelle.APIClientCodeGenerator)** and **[Visual Studio 2017](https://marketplace.visualstudio.com/items?itemName=ChristianResmaHelle.ApiClientCodeGenerator2017)**
+
 This VS Code extension is a cross-platform alternative to the Visual Studio extension for generating C# REST API clients from OpenAPI/Swagger specifications.
 
 ## Features