Add keychain-environment

This requires "keychain" to be installed.

init.el

@@ -792,6 +792,10 @@ See also `crux-reopen-as-root-mode'."
           (define-key isearch-mb-minibuffer-map (kbd key) command)))))))
   (isearch-mb-mode +1))
 
+(setup (:straight-when keychain-environment
+         (executable-find "keychain"))
+  (keychain-refresh-environment))
+
 (setup (:straight lacarte)
   (:+key "<f10>" #'lacarte-execute-menu-command))