cli : Create factory for get_config_for_ds

[Samk13]

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Description

Address the FIXME noted in the following section: https://github.com/inveniosoftware/invenio-vocabularies/blob/a180d29f38f366b37d228314accac96fc74b6d81/invenio_vocabularies/cli.py#L27-L51

Preferably merge #297 first to pass the unrelated failing test.

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[Samk13]

Question: in datastreams/factories L40: https://github.com/inveniosoftware/invenio-vocabularies/blob/a180d29f38f366b37d228314accac96fc74b6d81/invenio_vocabularies/datastreams/factories.py#L28-L42 Specific factories like WriterFactory, ReaderFactory, and TransformerFactory inherit from both Factory and OptionsConfigMixin, accessing options() successfully. However, the base Factory class does not inherit from OptionsConfigMixin, leading to Pylint errors when accessing options() Class 'Factory' has no 'options' memberPylint.

Should we adjust the design to include OptionsConfigMixin in Factory for direct options() access, or is the separation intentional to restrict options() access to specific factories only?