Feature - Schema Generation (#13353)

* Schema generation is working

* Added option to either dump to a file or the console

* Moving schema file and utilizing settings definition for file paths

* Cleaning up the imports and fixing a few pythonic issues

* Tweak command flags

* Clean up choices mapping

* Misc cleanup

* Rename & move template file

* Move management command from extras to dcim

* Update release checklist

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Co-authored-by: Jeremy Stretch <[email protected]>