feat: Virtualized docs list, auto scroll to active item on refresh

[caiters]

Three main things being added here

• virtualizing the list of items in the docs list using tanstack react virtualizer
• when user refreshes the page, if the active item is not visible in the docs list, list will be scrolled until the active item is visible
• added a button so if you scroll away from the currently active item and want to return to it, it will be easy to do so

==

Video showing page refresh results in active item being visible, and the "scroll to" button when it is scrolled out of frame:

Screen.Recording.2024-02-02.at.4.36.51.PM.mov

[CLAassistant]

All committers have signed the CLA.