Add tagged release installers and CLI updater

[MasonChow]

Motivation

• Provide a release/install workflow so tagged releases produce per-platform artifacts users can download and install.
• Offer a simple cross-platform installer and an in-package CLI update flow so users can install/update without manual packaging steps.
• Support both npm and GitHub-Release based distribution to cover users on Windows (npm) and Unix-like systems (bash install).

Description

• Add a tag-triggered GitHub Actions release workflow at .github/workflows/release.yml that builds/tests Node/WASM across Linux, macOS and Windows and uploads source_map_parser_node-<platform>-<arch>.tar.gz artifacts.
• Add a cross-platform bash installer scripts/install.sh that detects OS/ARCH, downloads the matching release asset, installs files to an --install-dir, and creates a shim in --bin-dir.
• Add a packaged CLI crates/node_sdk/bin/source-map-parser.mjs which exposes source-map-parser update [--version] [--from npm|github] and supports updating via npm or by invoking the install script.
• Include bin/ in crates/node_sdk/package.json and expose the source-map-parser executable, and document install/update and tagged-release usage in crates/node_sdk/README.md.
• Release packaging step now stages dist/, bin/, skills/, README.md, LICENSE into per-platform tarballs for upload to GitHub Releases.

Testing

• Ran node crates/node_sdk/bin/source-map-parser.mjs --help and it printed help successfully.
• Validated scripts/install.sh syntax with bash -n scripts/install.sh and it passed.
• Ran git diff --check to ensure no whitespace/patch issues and it returned clean.
• Executed cargo test --workspace --exclude source_map_parser_node --all-features and all unit and integration tests completed successfully (all tests passed).

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Codex Task

[MasonChow]

1. 应该 node 包已经带好 rust 构建好的产物，不应该执行 install，不应该有远程调用
2. gitlab release 应该带有 npm 包版本和纯 rust 构建出来的多平台 cli
3. 应该提供在线 bash 升级用户去更新纯 rust 二进制版本

[MasonChow]

应该 node 的产物也带这个 sh 脚本，更安全更好被审查