Sidenavi is missing in documentation

[pschaub]

The documentation https://db-ui.github.io/core/ does not contain the sidenavi component.

Code: https://github.com/db-ui/core/tree/main/source/_patterns/02-components/sidenavi

[mfranzke]

@pschaub good catch, that's because the sidenavi component isn't part of Guidelines version 2 components, but only a leftover from Enterprise version 1 and still included for backwards compatibility.

We'll provide a new version with the DB UX Design System version 3 and than even also include it within the documentation.