Add nine games: Go Fish, Old Maid, Cribbage, Scopa, Casino,

Euchre, Pitch, Briscola, and Spite & Malice

Five new files, each reusing or extending an existing engine.

* cg-match.el: Go Fish and Old Maid, matching games on a shared
  helper set (completes the original wishlist).
* cg-cribbage.el: two-handed Cribbage to 121 -- the crib, the cut,
  pegging, and a full show scorer (fifteens, pairs, runs, flush, nobs).
* cg-scopa.el: a capture-by-sum engine driving Scopa (40-card, sette
  bello, primiera, scopas) and Casino (pairs and sums, big/little
  casino, aces, sweeps). Casino omits builds.
* cg-trick-ext.el: Euchre (24-card with both bowers), Auction Pitch
  (bid, pitch sets trump, High/Low/Jack/Game), and Briscola (fixed
  trump, no follow), as subclasses of the cg-trick engine.
* cg-spite.el: Spite & Malice, a competitive patience to empty the
  goal pile onto shared Ace-to-Queen centre piles; Kings are wild.

Wire all nine commands into the card-game chooser, extend the Makefile
EL list, and add README sections. Add ten ERT tests covering each
game's engine and a full AI-driven game; the suite is now 107/107 and
every file byte-compiles cleanly.

New files at Version 1.0.60 to match the tree; post-1.0.60 work
toward 1.0.90.

Makefile

@@ -3,7 +3,7 @@ EMACS   ?= emacs
 PKG      = card-games
 VERSION  = 1.0.60
 # Source files in dependency order (cg-core first).
-EL       = cg-core.el cg-svg.el cg-render.el cg-net.el cg-bid.el cg-gaps.el cg-bid-ui.el cg-bid-net.el cg-solitaire.el cg-trick.el cg-eights.el cg-patience.el cg-president.el cg-rummy.el cg-rum500.el cg-handfoot.el card-games.el
+EL       = cg-core.el cg-svg.el cg-render.el cg-net.el cg-bid.el cg-gaps.el cg-bid-ui.el cg-bid-net.el cg-solitaire.el cg-trick.el cg-eights.el cg-patience.el cg-president.el cg-rummy.el cg-rum500.el cg-handfoot.el cg-match.el cg-cribbage.el cg-scopa.el cg-trick-ext.el cg-spite.el card-games.el
 ELC      = $(EL:.el=.elc)
 PKGDESC  = $(PKG)-pkg.el
 TARDIR   = $(PKG)-$(VERSION)