docs: link examples for npm + bump to 2.1.1

[IBJunior]

• Convert README example references to absolute GitHub links so they work on npmjs.com
• Bump version to 2.1.1
• Update CHANGELOG.md for 2.1.1

This is a docs-only change to ensure links render properly on npm and to reflect the change in the changelog.

[Copilot]

Pull Request Overview

This PR updates documentation links and bumps the version to 2.1.1. The changes convert relative example file references to absolute GitHub URLs to ensure proper rendering on npmjs.com.

Key Changes

• Convert relative example file paths to absolute GitHub URLs in README.md
• Bump package version from 2.1.0 to 2.1.1
• Add changelog entry documenting the link fix

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
package.json	Version bump from 2.1.0 to 2.1.1
README.md	Convert relative example links to absolute GitHub URLs
CHANGELOG.md	Add 2.1.1 release notes documenting the link fixes