Document potential UX improvements for documentation

[LukSteib]

Goal

Improve UX of documentation page

Context

With #42 documentation was introduced.
With this issue we want to collect and tackle potential improvements

Assets

List of things noticed

• viewport once sidepanel navigation changes so that user first has to horizontally scroll in order to see side panel again (see r1)
• would be nice to have a visual indication (e.g. color highlighting) on current position in side panel navigation
• the title element of the whole application is now called Readme (see s1)

r1
https://www.loom.com/share/7100205cdcda4b3a9a063f77b26083ba

s1

Tasks

• Tackle points outlined above

[valiafetisov]

• It would be nice to show version of the package (but this can only be added once it's integrated via npm)