added dev container

Author: JetterMcTedder

README.md

@@ -4,6 +4,8 @@
 
 Can't install VS Code? Or the drivers? Or just want to test drive these examples? No problem! Create a codespace on this repository with everything you need pre-installed!
 
+This codespace takes a bit of time to create seeing we are installing all the languages and components you need.
+
 [![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://github.com/codespaces/new?hide_repo_select=true&ref=main&skip_quickstart=true)
 
 #### Driver examples include: