website: Expand data handling documentation with type-specific pages and examples

[bflad]

Closes #695

This change creates new attributes, blocks, and types sections, each with full information about each type. The attribute/block pages are cross-linked with their associated type pages and vice-versa.

Web platform changes to redirect the removed pages to existing pages will be handled separately on deployment.

[bendbennett]

Superb! This is fantastic 🚀

[austinvalle]

Couple comments, but overall this documentation was fantastic, really like the layout! 👍🏻

[mschuchard]

Past me from six months ago would have very much appreciated this, and therefore so will probably many others in the present and future.

@bflad I also have some proprietary code I developed for doing some crazy stuff with e.g. struct{set(object(object(set(object)))))} conversions among TF specific HCL2 schema, TF types models, TF Go data models, and SDK Go models (to be serialized/marshalled). If that kind of complexity belongs here I could try to sanitize it and contribute it (it would probably need to be reviewed for best practices first which would also be helpful for me anyway). It could also be placed somewhere else I have no idea. Just let me know.

[github-actions]

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