date: implement the set date #1754
Description
coreutils/src/uu/date/src/date.rs
Line 234 in bfc9e13
It should be cross platform but starting with one platform first is fine.
Tests are in
https://github.com/uutils/coreutils/blob/8337179454d0c952746a980ee37a32340f510a46/tests/by-util/test_date.rs