Add Demo Section and Update Package to v1.1.6

Release Description:

• Added Demo Section: Introduced a new section in the README.md that includes links to a live demo of the KeyHub Example App and the source code repository for easy access.
• Version Update: Updated the package version to 1.1.6.
• Testing and Build: Successfully ran all tests, performed type checking, and built the package with no issues.
• Size Check: Verified that the gzipped package size remains within the limit of 10 KB.
• Git Tag: Created a new git tag v1.1.6 for this release.

This release enhances the documentation and provides users with direct access to examples, improving the overall usability of the React KeyHub package.