022 args cross target

// NOTE: narrowed to Zig — print.ln of a bare variable WITH newline has no JS
// variant yet (print.ln is a Zig comptime transform; std/io:print has |js but no
// newline). print.ln cross-target JS for variable args is a tracked gap.
// Dual-target: the SAME .kz reads argv via std/args on both Zig and JS.
// ARGS = "hello\nworld" → Koru argv index 1 = hello, 2 = world (both targets).
~import std/args
~import std/io

~std/args:get(index: 1)
| arg a |> std/io:print.ln(a)
| out-of-bounds |> std/io:print("<none>\n")

~std/args:get(index: 2)
| arg a |> std/io:print.ln(a)
| out-of-bounds |> std/io:print("<none>\n")