[explore] Variant store: TileDB

[pdiakumis]

• TileDB-VCF: https://github.com/TileDB-Inc/TileDB-VCF
• R interface at https://tiledb-inc.github.io/TileDB-R/index.html
• Money money: https://tiledb.com/pricing
• 2025 VCF blog: https://tiledb.com/blog/population-genomics-data-with-tiledb