Add one-line curl install/uninstall scripts

[madeye]

Summary

Adds curl … | bash install and uninstall entry points, and documents the one-liners in the README and the docs guide.

# install (latest release for your platform + root helper)
curl -fsSL https://raw.githubusercontent.com/madeye/LianYaoHu/main/scripts/install.sh | bash
# uninstall
curl -fsSL https://raw.githubusercontent.com/madeye/LianYaoHu/main/scripts/uninstall.sh | bash

scripts/install.sh — detects the platform (maps to aarch64-apple-darwin / x86_64-unknown-linux-gnu; clear build-from-source error otherwise), resolves the latest tag via the GitHub releases/latest redirect (no jq/gh needed), downloads the tarball + .sha256, verifies it (sha256sum or shasum), installs lianyaohu + lyh into /usr/local/bin (sudo only when the target isn't writable), and runs the packaged install-helper.sh with LIANYAOHU_HELPER_BINARY set so it uses the downloaded binary instead of building. Flags: --version, --bin-dir, --no-helper; env overrides LIANYAOHU_VERSION / LIANYAOHU_BIN_DIR / LIANYAOHU_NO_HELPER / LIANYAOHU_REPO.

scripts/uninstall.sh — tears down the root helper by fetching the canonical uninstall-helper.sh (keeps a single source of truth for the LaunchDaemon/systemd/group removal) and removes the binaries. Flags: --keep-helper, --bin-dir.

Also switches uninstall-helper.sh off its predictable /tmp/lianyaohu-group.$$ path to mktemp + trap, matching the install-helper.sh hardening from #39.

Testing

• bash -n on all three scripts.
• End-to-end install into a temp --bin-dir with --no-helper against the real v0.1.3 release: latest-tag resolution, download, checksum verification, extraction, and both binaries installed and runnable.
• Uninstall binary-removal path (--keep-helper) into the same temp dir.

Note: the main-pinned raw URLs resolve only after this merges. The helper-teardown fetch in uninstall.sh likewise needs this on main (or LIANYAOHU_REF).

🤖 Generated with Claude Code