v0.13.0-rust.3

Built and verified by .github/workflows/release.yml. Each pty binary is checked to reference no /nix/store path, and each libghostty-vt archive is checked to build and test pty-terminal and pty-testkit with no Zig, before it is attached. To use an archive, see the README: Depending on pty-terminal or pty-testkit without Zig.