TileDB on NixOS

[CMCDragonkai]

We are adding tiledb to the NixOS project.

While we are able to build the main library, we need some help figuring out how to build the documentation and tests for the package expression: NixOS/nixpkgs#67187

[stavrospapadopoulos]

Just FYI, the official TileDB is maintained at https://github.com/TileDB-Inc/TileDB. We'd be happy to help with documentation and tests.