* Re-modelling API models (take two)
* Do not use "content" - use "document" and "media" instead.
* Move "item" endpoints to their own silo
* Use "Id", not "Key"
* Regenerate OpenApi.json
* Rename user start node IDs from "content" to "document"
* Regererate OpenApi.json after forward merge
* update importmap
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Co-authored-by: Mads Rasmussen <madsr@hey.com>
* Added management API for dynamic root and query steps.
* Open API
* Split models, use required and rename a little
* Rename query steps
* Make request culture and segment optional
* Introduce explicit back-office variation context
* Simplify query endpoint path
* Correct field naming
* Updated OpenApi.json
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Co-authored-by: kjac <kja@umbraco.dk>