Define CLI contracts, enhance npm workflow, and update documentation

[lahiruudayakumara]

Summary

This pull request introduces comprehensive improvements to the release process for CorexPM, including a new automated release script, updated release documentation, and enhancements to the build workflow to support cross-compilation for Linux ARM64. It also formalizes the release checklist and updates the changelog for the 1.0.0 release.

Release Process Automation & Documentation:

• Added a standard release automation script (scripts/release.sh) that validates the codebase, builds binaries, packages the npm distribution, generates SHA-256 checksums, and creates annotated git tags.
• Introduced a detailed release maintainer checklist (docs/contributing/release-checklist.md) outlining pre-release, release, and post-release steps.
• Overhauled the release process guide (docs/contributing/releases.md) to document the standard release workflow, supported targets, and step-by-step instructions.

Build & CI Improvements:

• Updated the GitHub Actions workflow (.github/workflows/npm-release.yml) to support cross-compiling for Linux ARM64 by installing the appropriate toolchain and configuring the linker.

Release Notes & Changelog:

• Updated the changelog (CHANGELOG.md) for the 1.0.0 release, detailing all major features, release tooling, and distribution improvements.

Validation

• cargo fmt --all --check
• cargo clippy --workspace --all-targets -- -D warnings
• cargo test --workspace

Compatibility and security

• Documentation and compatibility matrix are updated if behavior changed.
• Threat model or security documentation is updated for new trust boundaries.
• Persistent format/API changes have an RFC and migration story.
• Performance claims include reproducible evidence.