Frontend server settings (#5765)

* Update ApiToken model

- Add metadata
- Remove unique_together requirement
- Add last_seen field

* Update admin page for token

* Store metadata against token on creation

* Track last-seen date

* Allow match against existing valid token

- If token is expired or revoked, create a new one
- Prevents duplication of tokens

* Update unit tests

* Fix default server

* Improve functionality for extracting frontend settings

* Update default server list

* Use f-strings

* Revert logger name

* Remove mark_safe warning

InvenTree/config_template.yaml

@@ -290,18 +290,17 @@ remote_login_header: HTTP_REMOTE_USER
 #   logo: img/custom_logo.png
 #   splash: img/custom_splash.jpg
 
-# Platform UI options
-# pui_settings:
+# Frontend UI settings
+# frontend_settings:
+#   base_url: 'frontend'
 #   server_list:
 #     my_server1:
-#       host: https://demo.inventree.org/api/
+#       host: https://demo.inventree.org/
 #       name: InvenTree Demo
 #   default_server: my_server1
 #   show_server_selector: false
 #   sentry_dsn: https://84f0c3ea90c64e5092e2bf5dfe325725@o1047628.ingest.sentry.io/4504160008273920
 #   environment: development
-# Base URL for serving Platform UI
-# pui_url_base: 'platform'
 
 # Custom flags
 # InvenTree uses django-flags; read more in their docs at https://cfpb.github.io/django-flags/conditions/