Initial import of ve-1.0

Initial import of ve-1.0

NTHU-CS Maple BBS 2.36 BBS-like editor

ve is a tiny editor. Besides normal functions, it has some
great features for programmers --
goto line (ESC-G)
cut & paste cross files (Ctrl-G to see ve.hlp)
block shift left/right (ESC-J/K, Ctrl-G to see ve.hlp)
parenthesis matching (ESC-[)
seaching (Ctrl-S, ESC-n, ESC-p)
   (matching start of line, case sensitive/in-sensitive, forward/backward)
undo line (ESC - '-', or ESC-_   )
undelete lines (ESC-u)
...
emacs-like hot-key

Provided by Rui-Xiang Guo <rxg@netbsd.org> in pkg/16268