Representation of name-suggestion-index in RDF/Turtle

- https://nsi.guide/
- https://github.com/osmlab/name-suggestion-index
- https://github.com/osmlab/name-suggestion-index/tree/main/schema
- https://github.com/osmlab/name-suggestion-index/tree/main/dist

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General issue about name-suggestion-index. However, if gets complicated, we could break in smaller ones.