Usage of Github Action requires a test that is compatible with their virtual environment

[tc88]

The current test script 'runAllExamples' requires an installed tex-live besides some other tools. At least tex-live is not availible in the virtual environments provided by Github Actions. Thus, there are two main options to solve this issue:

• use a self-hosted running server
• write a test-file that runs in the virtual environment provided by Github Actions