Warning when user is not on current version of doc (latest)

[FlorianJacta]

Description
The goal is to prevent users from navigating an old release of Taipy and having issues when testing Taipy with this documentation. We should have a warning saying that the user is not on the most recent version of the doc/Taipy.

proposal:
https://docs.readthedocs.io/en/stable/versions.html#version-warning

• No customization is possible with the previous link proposal.
• It requires a change in the naming convention: develop would become latest, latest would become stable.

Ideal solution:
It would be good to improve the UX of the actual version selector.