POSIX-compliant

TODO list does not seem to exist. # find <https://pubs.opengroup.org/onlinepubs/9799919799.2024edition/utilities/find.html> - [x] -L, -H (#412) — implemented but not in `find --help` - [x] -links (#10) — implemented but not in `find --help` - [ ] -ok (#8) https://github.com/uutils/findutils/blob/245623ecc6a19537b9f1fd94cb917653f170291d/src/find/mod.rs#L267-L303 # xargs <https://pubs.opengroup.org/onlinepubs/9799919799.2024edition/utilities/xargs.html> - [ ] -p