readme: add a few badges

Author: Lukas Neubert

README.md

@@ -1,9 +1,13 @@
 # Visual Basic language support for VS Code
+
+![GitHub Workflow Status](https://img.shields.io/github/workflow/status/serkonda7/vscode-vba/CI)
+[![Version](https://vsmarketplacebadge.apphb.com/version/serkonda7.vscode-vba.svg)](https://marketplace.visualstudio.com/items?itemName=serkonda7.vscode-vba)
+[![Installs](https://vsmarketplacebadge.apphb.com/installs/serkonda7.vscode-vba.svg)](https://marketplace.visualstudio.com/items?itemName=serkonda7.vscode-vba)
+
 ## Installation
 Launch the quick open view (`ctrl`+`P`) and run the following command.
 ```
 ext install serkonda7.vscode-vba
 ```
-
 ## License
 [MIT](LICENSE.md)