x11/cliphist: add new port
cliphist is clipboard history "manager" for wayland
- write clipboard changes to a history file
- recall history with dmenu (for example)
- both text and images are supported
- clipboard is preserved byte-for-byte
- leading / trailing whitespace / no whitespace or newlines are preserved
- won’t break fancy editor selections like vim wordwise, linewise, block mode
- no concept of a picker, only pipes