[CONTENT] Reorder adventures based on difficulty

[Felienne]

Describe the issue We (lightly) follow the convention that adventures left to right are easier to harder but with some new adventures, that is not always the case (f.e. parrot is easier than story) and the blanks (see also #2380) are not always in the later adventures.

Related but different(might need a separate issue) The order of the adventures as it is now is always the same for all levels, while that can potentially break the easier-to-hard order.