Removing has_fts field from split-duckdb-index (#2962)
* Removing has_fts field from split-duckdb-index
* Fix tests
* Apply suggestions from code review
Co-authored-by: Sylvain Lesage <sylvain.lesage@huggingface.co>
* Fix ISO 639-1 mapping for stemming (#2963)
Fix mapping
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Co-authored-by: Sylvain Lesage <sylvain.lesage@huggingface.co>
