folder-transfer v0.16.0

folder-transfer v0.16.0

Adds an embeddable library so you can drive transfers from your own code (no spawning the CLI).
PowerShell scripts unchanged.

Artifacts

• folder-transfer-0.16.0.zip — the PowerShell sender (reference implementation).
• ft-0.16.0-x86_64-windows.zip — ft.exe + ft.dll (+ ft.dll.lib), the C header
  ft.h, and a .NET binding FolderTransfer.cs, plus server.example.json.
• ft-0.16.0-x86_64-linux.tar.gz — ft (static musl CLI) + libft.so (glibc, for embedding),
  ft.h, server.example.json.

New: C-ABI library (ft.dll / libft.so)

Call file transfer straight from .NET (P/Invoke), C, or C++:

• ft_get(server, port, token, fingerprint, to, ignore, streams) — pull a folder.
• ft_serve_start(folder, port, streams, ignore, no_compress, once, out_token, …, out_fp, …) —
  serve in the background; the token + certificate fingerprint come back immediately to hand to the
  receiver. ft_serve_wait(handle) blocks until it finishes.
• ft_last_error(buf, len) — last error for the current thread.

A ready C# wrapper (FolderTransfer.cs) is included:

var srv = new FolderTransfer.Server(@"D:\data", 8722);          // returns srv.Token, srv.Fingerprint
FolderTransfer.Get("10.0.0.1", 8722, token, fingerprint, @"E:\incoming");  // on the receiver
srv.Wait();

Everything from 0.15.x (no subcommand, server-pushed config, interactive destination, live
progress, read-timeout/keepalives) is included. CLI behaviour is unchanged.