* initial work to render hierarchical region #13735
* adds site display #13735
* cleanup #13735
* adds display region tag #13735
* refactored region hierarchy #13735
* refactored region hierarchy #13735
* renamed display_region to nested_tree #13735
* Make render_tree suitable for generic use
* Remove errant item from __all__
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Co-authored-by: Jeremy Stretch <jstretch@netboxlabs.com>
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