Update to let users set the base URL globally

[tjperry07]

Is your feature request related to a problem? No

I know the base URL can be changed by clicking edit, but it's not obvious. I want to request that users can change the base URL globally or make the highlighted area a drop down.
During testing, the main issue that came up was people didn't understand they could change the URL and kept asking how to change it.

Describe the solution you'd like

Ability to change the base URL at the top so it's more obvious there are more URLs available
Add it to the menu.

Describe alternatives you've considered

N/A

Additional context

• Reduce users asking about the correct URL when viewing an endpoint.

Example showing how the URL is presented at at the top of the page.

Some options for the plugin:

• Add it as a menu item
• Add it to the introduction
• Make it into a dropdown on each endpoint (preferred since it takes up a lot of real-estate versus the edit for the try it now.)
• Set it globally at the introduction (Also preferred. See image above for example).

[tjperry07]

Otherwise, great plugin. Can't wait for the Docusaurus 3 official release.