Add support for documentation generation in the tutorial

In the tutorial about code generation: website/docs/plugin/code-generation/workflow-example.mdx

Could you add support about how to generate documentation as well? Maybe with https://github.com/terraform-docs/terraform-docs or something similar

Start with website/docs/plugin/code-generation/workflow-example.mdx and review how the tutorial currently explains code generation. Compare the requested documentation-generation support with the linked terraform-docs project or a similar tool. Done means the tutorial explains how to generate documentation alongside the existing workflow.

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