fix: allow sidebar to have static positioning

## 📑 Description Allow `static` as one of the positions in the sidebar so that it can be used as a drop in component in any page. This is in addition to `fixed` and `absolute`. Please let me know if it does not make sense :) ## ✅ Checks - [x] My pull request adheres to the code style of this project - [x] My code requires changes to the documentation - [x] I have updated the documentation as required - [x] All the tests have passed