The js-cookie library is deprecated

Hmm that's a bummer, we only recently had a fix for this to make the module D10 compatible.

If I look at how this was implemented I think we just need a dependency on https://github.com/js-cookie/js-cookie/releases to make this work. Although I'm not 100% sure about this.

We only use the cookies.set and cookies.get functions. We could use vanilla JS for this.