Feature Request: Add stix2misp to main funtion

[NielsDeryckere]

Is your feature request related to a problem? Please describe.

When running the "misp_stix_converter" command there is no switch to select the stix2misp functionality.

Describe the solution you'd like

Add a switch to the "misp_stix_converter" command to select stix2misp functionality. I have noticed in the [misp_stix_converter.py] file the definition for stix2misp is already present. It just needs to be included in the [init.py] file.
Thank you for making this great tool available. Kind regards

Describe alternatives you've considered

No response

Additional context

No response

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