PR Summary

• Introduction of Bash Loops Guide
  The team added a new guide ("011-bash-schleifen.md") which talks about different types of loop structures in Bash—a popular scripting language. This guide covers loops such as "for", "while", and "until", and provides real-life examples that help illustrate their usage, making this concept easier to understand. This will help anybody who's trying to learn and make the most of scripting in Bash.

• New Guideline for Bash Functions
  This PR also introduces a tutorial ("012-bash-funktionen.md") designed to help users understand how to define and employ functions in Bash. Annotated examples are provided in this guide, which illuminates the proper structure of a function and gives a practical demonstration of their usage. This could greatly benefit anyone hoping to streamline their scripts with reusable function blocks.