nflverse_download() should provide an argument to reload specific data from a release

[mrcaseb]

We have implemented the use_hive argument to provide an easy way to use arrow::open_dataset, esp. for pbp data.

If someone wants to actually use this in-season, we have to implement an argument that allows to download the most recent season only (like the force_rebuild argument in nflfastR::update_db()). Otherwise there is no easy way to update current season pbp without loading everything else as well.

I have described the force_rebuild argument as follows:

[mrcaseb]

So what I want is to make this code

nflreadr::nflverse_download(
  pbp, 
  folder_path = "some_path", 
  file_type = "parquet",
  use_hive = TRUE,
  reload = 2022
)

to only download 2022 pbp into the correct folder.

[mrcaseb]

I am an idiot. A timestamp check is included. The function will only download if something has changed