Adding DocsVersionDropdown for a sidebar #196
Description
With the newer version releases, we might require "DocsVersionDropDown" in the sidebar. For Example, with RedisInsight v2.0 recent release, we want to keep both v1.x and v2.x in the sidebar.
This Docusaurus v2 doc looks to be a good starting point: https://github.com/facebook/docusaurus/blob/main/packages/docusaurus-theme-classic/src/theme/NavbarItem/DocsVersionDropdownNavbarItem.tsx