Add SuperComponents to simplify pipeline building

[julian-risch]

With haystack-experimental 0.7.0, we added ready-made SuperComponents and a SuperComponent abstraction.
These SuperComponents bundle commonly used components and logic for indexing pipelines and make it simpler to build with Haystack: MultiFileConverter, SentenceTransformersDocumentIndexer, DocumentPreprocessor

We should identify what other ready-made SuperComponents can increase simplicity and need to bring experimental components to Haystack core depending on user feedback and possibly iterating on the implementation of the SuperComponents.