Add toc sidebar+dropdown (#272)

* Replace markdown-it-table-of-contents with markdown-it-toc-done-right

Co-authored-by: Erik Michelson <github@erik.michelson.eu>
Co-authored-by: Philip Molares <philip.molares@udo.edu>

Extract render window code

Co-authored-by: Erik Michelson <github@erik.michelson.eu>
Co-authored-by: Philip Molares <philip.molares@udo.edu>

add new package

fix stickyness

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>

show toc sidebar only if there is enough space

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>

* add min height class

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>

* Move markdown toc into own component

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>

* add sidebar buttons

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>

* Use other button color

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>

* Change name of component

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>

* Fix merge issues and make toc work again

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>

* pin dependencies

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>

* remove blank line

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>

* pin dependency

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>

* Fix anchors

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>

* Add use memo

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>

* Add change log entry for removal of custom slugify

src/components/common/splitter/splitter.tsx

@@ -54,7 +54,7 @@ export const Splitter: React.FC<SplitterProps> = ({ containerClassName, left, ri
         </div>
       </ShowIf>
       <ShowIf condition={showRight}>
-        <div className='splitter right'>
+        <div className='splitter right overflow-y-scroll'>
           {right}
         </div>
       </ShowIf>