fix bug in "from_json method"

[psauvan]

Load_step_file method was called before Settings class was updated.

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Fixes issue

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• [ ] I'm making a PR from a feature branch on my fork into GEOUNED-org/GEOUNED/dev branch
• [ ] I have followed PEP8 style guide for Python or run a formatter such as black or ruff format on my code
• [ ] I have made corresponding changes to the documentation
• [ ] I have added tests that prove my fix is effective or that my feature works

[shimwell]

I think the load step file does not make use of information from the settings class or vice versa so perhaps the order does not matter?

the skip solids is not longer part of the settings class it is passed directly to the load_step method

    def load_step_file(
        self,
        filename: typing.Union[str, typing.Sequence[str]],
        skip_solids: typing.Sequence[int] = [],
    ):

[psauvan]

Yes it does! the compSolids parameter of the Settings class is used in load_step_file method.