CI: Enable releases with Github Actions

[MatiasOS]

Summary

This PR sets up automated npm publishing using GitHub Actions and bumps the package version to 0.1.1.

Changes

Added GitHub Actions workflow for automated npm publishing

• Created .github/workflows/npm-publish.yml to automatically publish to npm on pushes to main branch
• Workflow builds the package and publishes using OIDC authentication
• Uses Node.js 24 and the JS-DevTools/npm-publish action

Updated package metadata

• Bumped version from 0.1.0 to 0.1.1 in package.json and package-lock.json
• Added repository URL pointing to openscan-explorer/explorer-metadata
• Added publishConfig with access: "public" to enable public npm publishing

Notes

The workflow will trigger automatically upon merging to main and publish the package to the npm registry.