[New article]: ML.NET 3.0 docs and examples

[gewarren]

• [ ] Creating how-to guides / samples that use ML.Tokenizers (even something as simple as what's in the release notes would be a good start).
• [ ] Add migration guide for other libraries - machinelearning/docs/code/microsoft-ml-tokenizers-migration-guide.md
• [ ] Showing examples of how you might use TensorPrimitives in AI / ML worklflows - luisquintanilla/OpenAIAutoMLNET: .NET Console app that shows how to train a regression model to predict the star review using ML.NET AutoML and Azure OpenAI service embeddings for fine food reviews
• [ ] Freshness. We've introduced new scenarios that we don't have listed in our list of scenarios. There's opportunities for tutorials for these scenarios of which we have none today.
  • What is Model Builder and how does it work? - ML.NET | Microsoft Learn
  • https://devblogs.microsoft.com/dotnet/announcing-ml-net-3-0/#deep-learning

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Associated WorkItem - 206384