chore: add versioned npm release workflows

[jan-kubica]

Summary

Adds reusable VERSION-based npm release workflows:

• preflight checks for VERSION, package metadata, npm package state, git tag state, and GitHub release state
• finalizer validates packed tarballs against configured package files before tagging or publishing
• finalizer stages GitHub releases as drafts, publishes/verifies npm packages, then publishes the GitHub release
• tarball publish order is derived from intra-release package dependencies, so platform packages publish before root meta-packages

Validation

• actionlint .github/workflows/npm-version-preflight.yml .github/workflows/npm-version-finalize.yml
• git diff --check

CC on behalf of @jan-kubica

[gemini-code-assist]

Note

Gemini is unable to generate a review for this pull request due to the file types involved not being currently supported.