Add's topic label field as pydantic param for documentation generation NOM-1661

[AndriyMulyar]

:rocket:	This description was created by Ellipsis for commit 646b08cc49ee96b0b4e684a94500fd84357bcdfc

Summary:

Renamed a field in NomicTopicOptions for clarity, updated relevant classes and methods, and ensured backward compatibility across multiple files.

Key points:

• Renamed community_description_target_field to topic_label_field in nomic/data_inference.py.
• Updated NomicTopicOptions class to use topic_label_field with alias community_description_target_field.
• Adjusted the Field alias for backward compatibility.
• Modified NomicTopicOptions.dict method to replace topic_label_field with community_description_target_field for backward compatibility.
• Modified nomic/dataset.py to use topic_label_field instead of community_description_target_field.
• Ensured backward compatibility by using alias in Field and updating create_index method.

---

Generated with :heart: by ellipsis.dev