Move Software Testing to the new workbench lesson

[lyashevska]

How to move content of the workshop:

• Clone the esciencecenter-digital-skills repository you want to move the content to
• Try to build a website locally
• Add a new episode.
  • If the episode comes from the Carpentry, copy it from the GitHub repository. Example for git lesson: https://github.com/swcarpentry/git-novice/tree/main/episodes
  • Adjust it if needed. Example for git lesson: see here.