Heh 𓁨 v1.0.3

A correctness and infrastructure release. No language change.

Fixed: the crate did not build on the Rust version it claimed to support.
Cargo.toml promises rust-version = "1.70", but the code used
std::iter::repeat_n (stable only since 1.82) and compared ExitCode
values. Anyone on Rust 1.70–1.81 running cargo install heh-lang hit a
compile error. Both are replaced, and the claim is now proven on every PR by
a CI job that builds with a real 1.70 toolchain.
CI runs the full suite on macOS and Windows as well as Linux — release
binaries ship for all three, and only one had ever been tested. Doing so
found three Windows-only harness bugs (CRLF in byte-exact fixtures, CRLF from
CPython in the arithmetic differential, and malformed file:// URLs), all
fixed. .gitattributes now pins LF for sources and fixtures.
CI also enforces cargo clippy -- -D warnings; the tree is clippy-clean.
Documentation pruned from 18 markdown files to 6: the agent handoff kit and
per-release notes files were scaffolding for a build that is finished. Their
content lives on in AGENTS.md and CHANGELOG.md. Fixed a dangling
docs/agent/TASK_MENU.md reference in heh --help.

Install

cargo install heh-lang     # the crate is heh-lang; the command is heh

Or download a binary below — linux x86_64, Windows x86_64, macOS arm64 and
x86_64. Checksums in SHA256SUMS.txt.