New egg: SRFI-67: Compare Procedures

[noosphere]

I'd like to submit a new egg for publication:

  SRFI-67: Compare Procedures

This was packed from the reference implementation with permission from
Kon Lovett, the author of the Chicken 3 SRFI-67 egg.

Unfortunately, that egg could not itself be ported because it relied on
syntax-case, which was available for Chicken 3, but is not for
Chicken 5.  So this Chicken 5 implementation is done from scratch from
the reference implementation.

Its documentation is here: [1]

Its release-info is here: [2]

test-new-egg gives the egg a clean bill of health.

 --Sergey

[1] - https://wiki.call-cc.org/eggref/5/srfi-67

[2] - https://github.com/diamond-lizard/srfi-67/raw/main/release-info