Adding Collapsible Sidebar for Better Visibility of Categories

[himanshu-03]

Is your proposal related to a problem?

I'm always frustrated when I see a documentation website and the sidebar seems to be broken as even if we hover around another category the former category stays expanded as long as I dont click on it again!

Describe the solution you'd like

I would like to add a config property in the website so that the the category which is clicked gets auto shrinked when we hover to some other category

Describe alternatives you've considered

I have my own org's website builded via Docusaurus and I have implemented this feature there as well!