New example along storyline: Turbine monitoring

### Description As described in https://cwiki.apache.org/confluence/display/AIRFLOW/Examples+Refurbish A new Dag is implemented along the described storyline for "Turbine monitoring" This includes: - New Dag is added in Taskflow as well as classic implementation - Dag is according to checklist - Previous examples that are content-wise replaced are deleted to incrementally clean-up - Airflow documentation is adjusted to point to new examples are replaced - General example storyline overview is adjusted and the functioning of the new example is described ### Use case/motivation Airflow Examples have been grown in number and focus over the past years. They purpose multiple things: Serve as tutorials to learn Airflow DAG implementation Serve with code snippets for documentation Serve for testing the setup (some) service for CI integration testing Some example DAGs are in a good quality, some are not following best practices. Current examples do not follow a structure. There are example DAGs contained in the Airflow core (currently pushed to standard provider/example_dags) as well as there are more examples in other providers. But examples from other providers are lot loaded automatically. So in the [Airflow 3 Dev Calls](https://cwiki.apache.org/confluence/display/AIRFLOW/Airflow+3+Dev+call%3A+Meeting+Notes#Airflow3Devcall:MeetingNotes-22May2025) there was a demand named to clean-up and optimize example DAGs. ### Related issues #52476 is made before and might be adjusted ### Are you willing to submit a PR? - [ ] Yes I am willing to submit a PR! ### Code of Conduct - [x] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)