Implement more pipes with NCBI functions

[stitam]

These pipes should work:

Subsequent links with ncbi_link()

bioproject |> 
    ncbi_link(from = "bioproject", to = "biosample") |> 
    ncbi_link(to = "assembly")

Subsequent links with ncbi_link_uid()

bioproject |> 
    ncbi_get_uid(from = "bioproject") |>
    ncbi_link_uid(to = "biosample") |> 
    ncbi_link_uid(to = "assembly")

Link followed by ncbi_get_meta()

bioproject |> 
    bioproject |> 
    ncbi_get_uid(from = "bioproject") |>
    ncbi_get_meta()

Link followed by ncbi_download_genome()

bioproject |> 
    ncbi_get_uid(from = "bioproject") |>
    ncbi_link_uid(to = "assembly") |>
    ncbi_download_genome()

Link followed by ncbi_recover_id()

biosample |>
    ncbi_get_uid(db = "biosample") |> 
    ncbi_link_uid(to = "assembly") |> 
    ncbi_recover_id()