User defined states (#7862)

* Add custom user defined states

* make tests more reliable

* fix list options

* Adapt version

* do not engage if rebuilding

* remove unneeded attr

* remove unneeded attr

* fix enum imports

* adapt cove target

* Add status_custom_key to all other serializers

* fix serializer method

* simplify branching

* remove unneeded imports

* inherit read_only status from leader field

* Add more tests

* fix tests

* add test for function

* refactor for easier testing

* move test to seperate class

* Add options testing

* extend serializer

* add test for all states and refactor to reuse already build functions

* use custom field in PUI too

* reset diff

* style fix

* fix comparison

* Add test for str

* test color exceptions too

* remove user state from tracking

* Add intro from model fields too

* update docs

* simplify implementation

* update tests

* fix name

* rename test

* simplify tags and test fully

* extend test to machine status

* move logic for response formatting over

* extend api response with machine  status

* ensure only direct subclasses are discovered

* test for length of total respone too

* use new fields on PUI too

* fix test assertion with plugins enabled

* also observe rendering in filters

* Add managment endpoints and APIs

* Add contenttypes to PUI renderes

* use filteres instead

* fix import order

* fix api route definition

* move status choices to serializer

* fix lookup

* fix filtering

* remove admin integration

* cleanup migration

* fix migration change

* cleanup code location

* fix imports

* Add docs for custom states

* add links to custom status

docs/docs/extend/machines/overview.md

@@ -47,6 +47,8 @@ If you want to create your own machine type, please also take a look at the alre
 
 ```py
 from django.utils.translation import gettext_lazy as _
+
+from generic.states import ColorEnum
 from plugin.machine import BaseDriver, BaseMachineType, MachineStatus
 
 class ABCBaseDriver(BaseDriver):
@@ -72,9 +74,9 @@ class ABCMachine(BaseMachineType):
     base_driver = ABCBaseDriver
 
     class ABCStatus(MachineStatus):
-        CONNECTED = 100, _('Connected'), 'success'
-        STANDBY = 101, _('Standby'), 'success'
-        PRINTING = 110, _('Printing'), 'primary'
+        CONNECTED = 100, _('Connected'), ColorEnum.success
+        STANDBY = 101, _('Standby'), ColorEnum.success
+        PRINTING = 110, _('Printing'), ColorEnum.primary
 
     MACHINE_STATUS = ABCStatus
     default_machine_status = ABCStatus.DISCONNECTED