Add WordLift AI

[ziodave]

see #1161: work in progress

see #1161: add docs

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[markpollack]

I am trying to limit the scope of models so that we can reach 1.0 GA efficiently vs. growing scope. I appreciate this PR but think we may need to find another temporary home for it, perhaps we need a spring-ai-contrib repository or something like that to enable people to benefit from these contributions. thoughts?