Add PRX macro from Howardism talk

lisp/mitch-packages.el

@@ -918,5 +918,14 @@ Return nil if DIR is not in a hugo project at all."
 (elpaca-use-package (cheat-sh :host github :repo "davep/cheat-sh.el")
   :commands cheat-sh)
 
+(elpaca-use-package (pcre2el
+		     :host github
+		     :repo "joddie/pcre2el")
+  :config
+  (defmacro prx (&rest expressions)
+    "Convert the rx-compatible regular EXPRESSIONS to PCRE.
+  Most shell applications accept Perl Compatible Regular Expressions."
+    `(rxt-elisp-to-pcre (rx ,@expressions))))
+
 (provide 'mitch-packages)
 ;;; mitch-packages.el ends here