📜 Workbook fixes, removes old structure

[Felienne]

Removes the old workbooks and fixes a date type issue in nl

[mergify]

Thank you for contributing! Your pull request is now going on the merge train (choo choo! Do not click update from main anymore, and be sure to allow changes to be pushed to your fork).

[Felienne]

Thanks for the approve Boryana, but I should have made this a draft since it still needs to be translated

[boryanagoncharenko]

Thanks for the approve Boryana, but I should have made this a draft since it still needs to be translated

Oh no, I am very sorry. It did appear in my non-draft PR filter, so I reviewed it and even pushed a merge conflict resolving commit. Sorry, I hope this does not mess things up too much.

The PR was not for review just yet

[Felienne]

Thanks for the approve Boryana, but I should have made this a draft since it still needs to be translated

Oh no, I am very sorry. It did appear in my non-draft PR filter, so I reviewed it and even pushed a merge conflict resolving commit. Sorry, I hope this does not mess things up too much.

No my bad! I should have made it draft!

[Felienne]

Ready for @MarleenGilsing to translate <3

[Felienne]

@boryanagoncharenko I removed the level 8 workbooks here so we can merge these fixes (should not have been one PR, sorry) will make a new PR with just level 8.