Rewrite tables exercises in favor of tabularray

[aknierim]

The exercises now aim to teach the basic usage of tabularray.

• Added tabularray to header, added tblr libraries siunitx and booktabs
• Removed booktabs from header
• Changed tabular environments to tblr, added respective options in tblr header
• Due to the length of the data a few lines were deleted to let the tables be displayed nicely (I don't see the need to introduce longtblr yet)

Regarding the last point: While tabularray certainly makes nicer tables, the spacing between rows can be too large for larger amounts of data. The spacing can of course be set with an option rowsep or rowsep+ in the tblr environments header, but that would probably to much for this tutorial. Alternatively, the longtblr env could be used, but this again would go too deep, imo.

[LuckyJosh]

Maybe we could add the longtblr options to a short " advanced" section
like the one for math typsetting.

[chrbeckm]

And/Or we build an additional exercise with a bit more explanation.
I would like to keep the slides as a complete overview, and not to hide something exclusively in the exercises.

[LuckyJosh]

Yes, I meant a 2 slide section in the latex slides

[aknierim]

Maybe we could add the longtblr options to a short " advanced" section like the one for math typsetting.

Yeah, I thought about that, too. Maybe right after the "Fortgeschritten: Mathe: Expert" section?

[aknierim]

And/Or we build an additional exercise with a bit more explanation. I would like to keep the slides as a complete overview, and not to hide something exclusively in the exercises.

Advanced slides + some additional exercises seem best to me