Add `-n` and `-e` options to `print`

[vinc]

We could add the -n option (from Unix v7) to avoid printing a trailing newline, and the -e option (from Unix v8) to interpret escape characters like Bash. The latter could also be done automatically by the command (and disabled with -E) like Zsh or by the shell.

https://www.gnu.org/software/bash/manual/bash.html#Bash-Builtins
https://zsh.sourceforge.io/Doc/Release/Shell-Builtin-Commands.html
https://www.cs.dartmouth.edu/~doug/reader.pdf
https://www.everything2.com/title/The+UNIX+and+the+Echo

This should simplify scripting of the socket command:

print -e -n "GET / HTTP/1.1\r\nHost: moros.cc\r\n\r\n" => /tmp/http.cmd
socket moros.cc 80 <= /tmp/http.cmd

Or when pipes will be implemented:

print -e -n "GET / HTTP/1.1\r\nHost: moros.cc\r\n\r\n" -> socket moros.cc 80

[vinc]

Both options will require alloc in userspace to be implemented in a simple way.

The arguments of the command that are not options will be collected in a vector to be printed at the end with a space between each argument (with join), after every escaped characters has been interpreted (with replace) if the option -e was used.

[vinc]

This can currently be done this way:

print "GET / HTTP/1.1" => /tmp/http.cmd
print "Host: moros.cc" =>> /tmp/http.cmd
print =>> /tmp/http.cmd
lisp lf-to-crlf.lsp /tmp/http.cmd
socket moros.cc 80 <= /tmp/http.cmd

Closing for now.