New egg: nitrate

Nitrate is a combinator-based pattern matcher. It can be thought of as 
parser-combinators over Scheme values. Being combinator based, it is 
extensible to user-defined record types and user-defined patterns 
without requiring support from the expander or the macro system.

release-info: https://florida.moe/nitrate/nitrate.release-info
wiki: https://wiki.call-cc.org/eggref/5/nitrate
git: https://codeberg.org/phm/nitrate

-- Peter McGoron