100 string type

// TEST: ~string creates a nominal string type
//
// ~string(EmailAddress) creates a distinct type that wraps []const u8
// Koru tracks it as a separate type for type checking purposes.
//
// Expected: Compiles and runs, EmailAddress is usable as a string

~import "$std/types"

const std = @import("std");

~string(EmailAddress)

~event send_email { to: EmailAddress }
| sent {}

~proc send_email {
    std.debug.print("Sending to: {s}\n", .{to});
    return .{ .sent = .{} };
}

~send_email(to: "user@example.com")
| sent |> _