Spring-ai Create a github pages web site with the reference docs for 0.7.1-SNAPSHOT docs

The project will move to 0.8.0-SNAPSHOT and have breaking changes. For people who want to continue to use 0.7.1-SNAPSHOT until that 0.8.0 release, these docs will still be available, but in another location since our use of antora can't yet support having two snapshot versions listed simultaneously.

Comment From: markpollack

This has been done and docs are located here - https://markpollack.github.io/spring-ai-0.7.1/