File name length limitation

[eli-daniels]

As workspace writes files, it could happen that a file name is very long. This leads to an error (on Windows at least), this should be handled more gracefully.

Reprex:

library(workspace)
  z <- new_workspace()
  long_name <- paste(rep("very_long_name", 100), collapse = "_")
  z <- store_dataset(z, iris, long_name)

Error message:

Error: IOError: Failed to open local file 'C:/Users/ELIDAN~1/AppData/Local/Temp/RtmpIj15eO/ws155c93e5d73/datasets/very_long_name_very_long_name_ ...