read_all_file: Read all file under dictionary in a batch
In Moonerss/ProteinBase:

Read all file under dictionary in a batch

read_all_file(
  path,
  pattern = NULL,
  merge = TRUE,
  recursive = FALSE,
  verbose = TRUE,
  ...
)

`path`	a character vector of full path names; the default corresponds to the working directory. Tilde expansion (see path.expand) is performed. Missing values will be ignored. Elements with a marked encoding will be converted to the native encoding (and if that fails, considered non-existent).
`pattern`	an optional regular expression. Only file names which match the regular expression will be returned.
`merge`	whether merge the data, default TRUE. or return a list.
`recursive`	logical. Should the listing recurse into directories?
`verbose`	output other useful message, default TRUE.
`...`	other argument of `fread`