Find rawdata and load it into memory for further process.
It requires the class attribute of the file is set prior to
using find_data() method. Otherwise, use read_file() function
instead unless you have specific reason not to.
Examples
if (FALSE) { # \dontrun{
file <- "path/to/my-data.csv"
class(file) <- "csv"
dt <- find_data(file)
} # }