Add racket-mode snippet

Author: jcs090218

racket-mode/jcs-header

@@ -0,0 +1,13 @@
+# -*- mode: snippet -*-
+# name: jcs-header
+# key: jcs-header
+# --
+;; ========================================================================
+;; $File: `(jcs-file-name)` $
+;; $Date: `(format-time-string "%Y-%m-%d %H:%M:%S")` $
+;; $Revision: $
+;; $Creator: ${1:CREATOR_NAME} $
+;; $Notice: See LICENSE.txt for modification and distribution information
+;;                   Copyright © `(format-time-string "%Y")` by ${2:COPYRIGHT_INFO} $
+;; ========================================================================
+$0