rd: Read files form a directory by a given function
In Lightbridge-AI/lbr: Data wrangling and analysis

Read multiple files from a directory (folder) using reading engine supply by a function.

rd(
  .f,
  path = ".",
  pattern = "\\.csv$",
  ...,
  invert = F,
  ignore.case = F,
  perl = F,
  fixed = F,
  all.files = F,
  recursive = F,
  no.. = F,
  snake_case = F
)

`.f`	A function to read files from a directory. First argument of the function must be file path. Support formula interface. Example : `utils::read.csv`, `readr::read_csv`, `rio::import`, `readxl::read_excel`, `base::readRDS`
`path`	Character: Path to desired directory which contain file, default is "." working directory. (passed to `base::list.files`)
`pattern`	Character: Specify regular expression to match file extension and file names. (passed to `grep()`) . Default is to read .csv file "\.csv$". Please select according to `fun`; Example, use `\\.xlsx$` to read from excel file.
`...`	Argument to pass to `.f`
`invert`	Logical: If `TRUE` read from file that file names do not match `pattern`.(passed to `grep()`)
`ignore.case`	If FALSE, the regular expression matching is case sensitive and if `TRUE`, case is ignored during matching.(passed to `grep()`)
`perl`	Logical: Should Perl-compatible regexps be used? (passed to `grep()`)
`fixed`	Logical: If `TRUE`, pattern is a string to be matched as is. Overrides all conflicting arguments.
`all.files`	If `TRUE` hidden files are also returned. (passed to `base::list.files`)
`recursive`	If `TRUE` read recursively in sub-directory.(passed to `base::list.files`)
`no..`	logical. Should both "." and ".." be excluded also from non-recursive listings? (passed to `base::list.files`)
`snake_case`	If `TRUE`: Convert names to snake_case_format. (require `snakecase` package)