Run code and command examples on login

Basic idea and Demand

All code and command examples (CCE) shown in the documentation have to be executable on the login nodes of Taurus. This will improve the documentation (less error-prone) and help the users to start faster.

Todos

• Script to extract CCE from markdown files
• Style to mark CCE not intended not to test
• Adopt CI/CD pipline incl. gitlab runner at taurus login nodes