New tutorial for: Classification of Queries for Haystack 2.0

[Amnah199]

Describe the tutorial you would like to see here
A similar tutorial on the Query Classifier for Haystack 2.0, as most of the tutorials for Haystack 1.0 have corresponding versions in Haystack 2.0.

Additional context
Pointed out in this Github discussion:
deepset-ai/haystack#7338 (comment)

• I've checked the existing tutorials

[julian-risch]

Let's also discuss router/classifier component names in this context

[julian-risch]

closed by #358