Store objects in WorkerConfig rather than nested dictionaries

[kif]

The idea is to store:

• Polarization description (actually a namedtuple)
• Units (actually a dedicated class)
• PoniFile (actually a dedicated class)
• ErrorModel (actually an enum)

in a transparent way and have the serialization/deserialization managed for the user

[kif]

@t20100 Hi Thomas, I believe you will love this PR:
Now attributes on the dataclass like poni, unit, polarization_description and error_model are stored in memory as their native python objects and serialized as needed.
This is not completely trivial since:

• PoniFile is a dataclass-like object
• Unit is also a dedicated class
• ErrorModel is an Enum
• PolarizationDescription is a named-tuple.

[kif]

New depreciation warning in pyFAI-integrate when importing a JSON file:

(py311) jerome@antarctica:/tmp/tutorial$ pyFAI-integrate 
INFO:numexpr.utils:NumExpr defaulting to 16 threads.
ERROR:pyFAI.gui.IntegrationDialog:No such file: .azimint.json
WARNING:pyFAI.io.integration_config:Those are the parameters which have not been converted !polarization_factor: None
WARNING:pyFAI.DEPRECATION:Function __contains__ is deprecated since pyFAI version 2025.02. Reason: Ponifile should not be used as a dict.
  File "/home/jerome/.venv/py311/bin/pyFAI-integrate", line 8, in <module>
    sys.exit(main())
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/app/integrate.py", line 855, in main
    result = _main(args)
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/app/integrate.py", line 848, in _main
    result = integrate_gui(options, args)
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/app/integrate.py", line 152, in integrate_gui
    result = app.exec_()
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/gui/widgets/WorkerConfigurator.py", line 560, in __selectFile
    self.loadFromJsonFile(filename)
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/gui/widgets/WorkerConfigurator.py", line 611, in loadFromJsonFile
    self.setConfig(config)
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/gui/widgets/WorkerConfigurator.py", line 332, in setConfig
    self.setWorkerConfig(integration_config.WorkerConfig.from_dict(dico, inplace=False))
WARNING:pyFAI.DEPRECATION:Function __getitem__ is deprecated since pyFAI version 2025.02. Reason: Ponifile should not be used as a dict.
  File "/home/jerome/.venv/py311/bin/pyFAI-integrate", line 8, in <module>
    sys.exit(main())
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/app/integrate.py", line 855, in main
    result = _main(args)
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/app/integrate.py", line 848, in _main
    result = integrate_gui(options, args)
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/app/integrate.py", line 152, in integrate_gui
    result = app.exec_()
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/gui/widgets/WorkerConfigurator.py", line 560, in __selectFile
    self.loadFromJsonFile(filename)
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/gui/widgets/WorkerConfigurator.py", line 611, in loadFromJsonFile
    self.setConfig(config)
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/gui/widgets/WorkerConfigurator.py", line 332, in setConfig
    self.setWorkerConfig(integration_config.WorkerConfig.from_dict(dico, inplace=False))
WARNING:pyFAI.DEPRECATION:Function get is deprecated since pyFAI version 2025.02. Reason: Ponifile should not be used as a dict.
  File "/home/jerome/.venv/py311/bin/pyFAI-integrate", line 8, in <module>
    sys.exit(main())
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/app/integrate.py", line 855, in main
    result = _main(args)
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/app/integrate.py", line 848, in _main
    result = integrate_gui(options, args)
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/app/integrate.py", line 152, in integrate_gui
    result = app.exec_()
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/gui/widgets/WorkerConfigurator.py", line 560, in __selectFile
    self.loadFromJsonFile(filename)
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/gui/widgets/WorkerConfigurator.py", line 611, in loadFromJsonFile
    self.setConfig(config)
  File "/home/jerome/.venv/py311/lib/python3.11/site-packages/pyFAI/gui/widgets/WorkerConfigurator.py", line 332, in setConfig
    self.setWorkerConfig(integration_config.WorkerConfig.from_dict(dico, inplace=False))

Geometry is not properly loaded

[kif]

Other issues found in json file saved from pyFAI integrate/pyFAI-calib2:

• poni_version absent from PoniFile serialisation
• polarization_description is still wrong (contains null or is a list of lists)
• Normalization should not be null but 1.0 when absent
• calib2 version has extra deprecated options like do_polarization, polarization_factor, do_mask, do_flat, do_dark

[kif]

integrate and diffmap are working as expected.