Ensure configuration settings are documented (#11674)

* Export configuration keys to JSON

* Support rendering of config options in docs

* Check for missing config settings

* Simplify macro

* Initial tests

* Fix collisions

* Updates

* Ensure values are stringified

* Ensure null values are exported correctly

* Refactor database config

- Observability on the config settings

* More docs updates

* Updates

* Add observability of cache settings

* More updates

* Observability

* Set env config for RTD

* Revert RTD config file

- Handled by ENV VAR on RTD account

* Visibility on background worker settings

* Tweaks

* Tweaks

* Split tracing settings out into separate file

- Improved discovery
- declutter settings.py

* Cleanup LDAP settings

* Social providers docs

* More updates

* Refactor ldap setup into own module

* Tweaks

* Formatting tweaks

* Tweak logic

* Fix INVENTREE_SESSION_COOKIE_SECURE setting

* Fix wrapping

* Add custom default

docs/docs/hooks.py

@@ -280,9 +280,27 @@ def on_post_build(*args, **kwargs):
     ignored_settings = {
         'global': ['SERVER_RESTART_REQUIRED'],
         'user': ['LAST_USED_PRINTING_MACHINES'],
+        'config': [
+            'INVENTREE_DB_TCP_KEEPALIVES',
+            'INVENTREE_DB_TCP_KEEPALIVES_IDLE',
+            'INVENTREE_DB_TCP_KEEPALIVES_INTERVAL',
+            'INVENTREE_DB_TCP_KEEPALIVES_COUNT',
+            'INVENTREE_DB_ISOLATION_SERIALIZABLE',
+            'INVENTREE_DB_WAL_MODE',
+            'INVENTREE_PLUGIN_DIR',
+            'INVENTREE_DOCKER',
+            'INVENTREE_FLAGS',
+            'INVENTREE_REMOTE_LOGIN',
+            'INVENTREE_REMOTE_LOGIN_HEADER',
+            'TEST_TRANSLATIONS',
+            'INVENTREE_FRONTEND_URL_BASE',
+            'INVENTREE_FRONTEND_API_HOST',
+            'INVENTREE_FRONTEND_SETTINGS',
+            'INVENTREE_LOGOUT_REDIRECT_URL',
+        ],
     }
 
-    for group in ['global', 'user']:
+    for group in ['global', 'user', 'config']:
         expected = expected_settings.get(group, {})
         observed = observed_settings.get(group, {})
         ignored = ignored_settings.get(group, [])