Remove unused variable

Add support for auto_weight counter on choices when loading selection field from custom_fields.yml ...

This also fixes a bug when using the same value for 2 different custom fields breaks becuase it tries to
create a new CustomFieldChoice object instead of reusing the one that already exists.

Implement fix for field 'filterable' that was broken. Added new custom field parameter 'filter_logic'

✨ Include Initializers ...

Initializers are startup scripts for common tasks like creating custom
fields. These are problems many users of Netbox Docker potentially face
and are therefore worth sharing.