Update readme to add documentation VSCode
This adds additional documentation to the README. For example adds TOC and how to use Jupyter from VSCode. Also adds additional C++ references
GitLab upgrade completed. Current version is 18.5.4
https://about.gitlab.com/releases/2025/09/18/gitlab-18-4-released/
https://about.gitlab.com/releases/2025/10/16/gitlab-18-5-released/
This adds additional documentation to the README. For example adds TOC and how to use Jupyter from VSCode. Also adds additional C++ references