P3: Avoid broken npm README link to docs/release.md

[vamgan]

Problem

The core README links to docs/release.md, but the npm package files list excludes docs/.

Relevant files:

• README.md
• package.json

Impact

The published npm README contains a broken relative link.

Suggested fix

Either:

• include docs/ in package files,
• move release instructions into README, or
• link to a stable GitHub URL.

Acceptance criteria

• Links in the published npm README resolve correctly.