stri_enc_list(simplify = FALSE)simplify is FALSE (the default), a list of
character vectors is returned. Each list element represents a unique
character encoding. The name attribute gives the ICU Canonical
Name of an encoding family. The elements (character vectors) are
its aliases. If simplify is TRUE, then the resulting list
is coerced to a character vector and sorted, and returned with
removed duplicated entries."UTF8" is also valid,
see stringi-encoding for more information.stri_enc_info,
stri_enc_mark, stri_enc_set,
stringi-encoding