games/greed: Update to 5.0

• Ported to Rust
• Added upstream patch that change the back end to use crossterm and build with cargo [1]
• Added DOCS option default OFF to optionally build manpage which depends on rubygem-asciidoctor

ChangeLog:
https://gitlab.com/esr/greed/-/blob/5.0/NEWS.adoc?ref_type=tags
[1] https://gitlab.com/esr/greed/-/commit/b28dd478e31901d42bbdfbf6364e0496d13936c5