Build order rules (#7842)

* Add new global setting

* Check if there are open children before completing a build

* Adds management command to export settings definition

* Fix settings export

* Extract settings data into documentation

* Add global settings spec

* User settings

* Revert strict mode

* Tweak unit test

* Remove unreachable code

* Always export settings first

* Remove unused macro

* Remove old images

* Re-add missing docs strings

* Tweak docs

* Remove unused import

readthedocs.yml

@@ -17,5 +17,6 @@ build:
       - echo "Generating API schema file"
       - pip install -U invoke
       - invoke migrate
+      - invoke export-settings-definitions --filename docs/inventree_settings.json --overwrite
       - invoke schema --filename docs/schema.yml --ignore-warnings
       - python docs/extract_schema.py docs/schema.yml